diff --git a/homework_01/task_01/src/main b/homework_01/task_01/src/main
new file mode 100755
index 0000000..9c844d0
Binary files /dev/null and b/homework_01/task_01/src/main differ
diff --git a/homework_01/task_01/src/main.cpp b/homework_01/task_01/src/main.cpp
index 0b3dcb2..c769d9e 100644
--- a/homework_01/task_01/src/main.cpp
+++ b/homework_01/task_01/src/main.cpp
@@ -1,9 +1,9 @@
 #include <iostream>
 
-#include <utils.hpp>
+#include "utils.hpp"
 
 int main() {
-  for (const auto& word : SplitString("asdas das das fgag (adasd 1fas)")) {
+  for (const auto& word : SplitString("a (a a) b (asd as) ")) {
     std::cout << word << "\n";
   }
   return 0;
diff --git a/homework_01/task_01/src/split_string_test.cpp b/homework_01/task_01/src/split_string_test.cpp
index 82d4994..2a64a4b 100644
--- a/homework_01/task_01/src/split_string_test.cpp
+++ b/homework_01/task_01/src/split_string_test.cpp
@@ -12,4 +12,6 @@ TEST_CASE("SplitString", "[simple]") {
   CHECK(SplitString("a\na\ta a") == std::vector<std::string>{"a\na", "a", "a"});
   CHECK(SplitString("a (a a)") == std::vector<std::string>{"a", "(a a)"});
   CHECK(SplitString("a (a a) b (asd as)  ") == std::vector<std::string>{"a", "(a a)", "b", "(asd as)"});
+  CHECK(SplitString("a\ta ") == std::vector<std::string>{"a", "a"});
+  CHECK(SplitString("a\ta") == std::vector<std::string>{"a", "a"});  
 }
diff --git a/homework_01/task_01/src/utils.cpp b/homework_01/task_01/src/utils.cpp
index a6989bd..668522e 100644
--- a/homework_01/task_01/src/utils.cpp
+++ b/homework_01/task_01/src/utils.cpp
@@ -1,7 +1,42 @@
 #include "utils.hpp"
 
+#include <iostream>
 #include <stack>
+#include <regex>
+#include <vector>
 
-std::vector<std::string> SplitString(const std::string& data) {
-  return {};
+using namespace std;
+
+
+std::vector<string> SplitString(const std::string& data) {
+    vector<string> result;
+    std::string word;
+    int flag = 0;
+    for (auto c : data) {
+      if(c == ')'){
+        word += c;
+        flag = 0;
+        continue;
+      }
+      if(flag == 1){
+        word += c;
+        continue;
+      }
+      if(c == '('){
+        word += c;
+        flag = 1;
+        continue;
+      }
+      if(c != ' ' && c != '\t') {
+        word += c;
+      }
+      else if(!word.empty()) {
+        result.push_back(word);
+        word = "";
+      }
+    }
+    if(!word.empty()){
+      result.push_back(word);
+    }
+    return result;
 }
diff --git a/homework_01/task_02/src/calculate_test.cpp b/homework_01/task_02/src/calculate_test.cpp
index 57a8cb9..a36aab2 100644
--- a/homework_01/task_02/src/calculate_test.cpp
+++ b/homework_01/task_02/src/calculate_test.cpp
@@ -1,4 +1,6 @@
-#include <catch2/catch_test_macros.hpp>
+#include "catch2/catch_test_macros.hpp"
+#include <catch2/catch_approx.hpp>
+
 
 #include "utils.hpp"
 
@@ -22,3 +24,39 @@ TEST_CASE("Calculate", "[simple_multiply]") {
   CHECK(Calculate("1*0") == 0);
   CHECK(Calculate("0*0") == 0);
 }
+
+TEST_CASE("Calculate", "[simple_division]") {
+  CHECK(Calculate("10/2") == 5);
+  CHECK(Calculate("4/2") == 2);
+  CHECK(Calculate("0/1") == 0);
+}
+
+TEST_CASE("Calculate", "[negative_numbers]") {
+  CHECK(Calculate("-3-2") == -5);
+  CHECK(Calculate("-6/2") == -3);
+  CHECK(Calculate("-8+5") == -3);
+  CHECK(Calculate("-6*2") == -12);
+}
+
+TEST_CASE("Calculate", "[simple_exponentiation]") {
+  CHECK(Calculate("3^2") == 9);
+  CHECK(Calculate("-2.5^2") == Catch::Approx(6.25));
+  CHECK(Calculate("-3.5^0") == 1);
+  CHECK(Calculate("0^2") == Catch::Approx(0));
+}
+
+
+TEST_CASE("Calculate", "[fractional numbers]") {
+  CHECK(Calculate("6.2*10") == Catch::Approx(62));
+  CHECK(Calculate("-1.5+2.5") == Catch::Approx(1));
+  CHECK(Calculate("-3.5/3.5") == Catch::Approx(-1));
+  CHECK(Calculate("-3.5-3.5") == Catch::Approx(-7));
+}
+
+TEST_CASE("Calculate", "[advanced_expressions]") {
+  CHECK(Calculate("6+10/2*2/2-1") == 10);
+  CHECK(Calculate("(2+3)+5") == 10);
+  CHECK(Calculate("(-2)+(-2)*(-2)^2") == -10);
+  CHECK(Calculate("(3/10)+(2.5*2)") == Catch::Approx(5.3));
+  CHECK(Calculate("3+((-7)-5/(2+3))*(7-2.5)") == -33);
+}
\ No newline at end of file
diff --git a/homework_01/task_02/src/main b/homework_01/task_02/src/main
new file mode 100755
index 0000000..ba59632
Binary files /dev/null and b/homework_01/task_02/src/main differ
diff --git a/homework_01/task_02/src/main.cpp b/homework_01/task_02/src/main.cpp
index 72a6f13..1bc8461 100644
--- a/homework_01/task_02/src/main.cpp
+++ b/homework_01/task_02/src/main.cpp
@@ -1,10 +1,10 @@
 #include <iostream>
 
-#include <utils.hpp>
+#include "utils.hpp"
 
 int main() {
   std::string data;
   std::getline(std::cin, data);
-  std::cout << Calculate(data);
+  std::cout << Calculate(data)<<std::endl;
   return 0;
 }
diff --git a/homework_01/task_02/src/utils.cpp b/homework_01/task_02/src/utils.cpp
index ebc7ffc..403aec7 100644
--- a/homework_01/task_02/src/utils.cpp
+++ b/homework_01/task_02/src/utils.cpp
@@ -1,7 +1,113 @@
 #include "utils.hpp"
+#include <iostream>
 
-#include <stack>
+double Calculate(const std::string& data) {
+    std::stack<char> operation;
+    std::stack<double> values;
+    Search(data,operation,values);
+    while(operation.size() > 0){
+        if(!Math(operation, values)){
+            return values.top();
+        }
+    }
+    return values.top(); 
+}
+
+bool Math(std::stack<char>& operation, std::stack<double>& values){
+    double a,b;
+    a = values.top();
+    values.pop();
+    switch (operation.top()) {
+        case '-':
+            b = values.top();
+            values.pop();
+            operation.pop();
+            values.push(b - a);
+            break;
+        case '+':
+            b = values.top();
+            values.pop();
+            operation.pop();
+            values.push(b + a);
+            break;
+        case '*':
+            b = values.top();
+            values.pop();
+            operation.pop();
+            values.push(b * a);
+            break;
+        case '/':
+            b = values.top();
+            if(a==0){
+                std::cerr<<"Can't divide by zero";
+                return false;
+            }
+            values.pop();
+            operation.pop();
+            values.push(b / a);
+            break;
+        case '^':
+            b = values.top();
+            values.pop();
+            operation.pop();
+            values.push(pow(b,a));
+            break;
+        default:
+            return false;
+    }
+    return true;
+}
+
+void Search(std::string str,std::stack<char>& operation, std::stack<double>& values) {
+    std::string word;
+    int flag = 1;
+    for (auto c : str) {
+        if (c == '+' || (c == '-' && flag == 0) || c == '*' || c == '/' || c == '^') {
+            if(!operation.empty() && Rang(c)<=Rang(operation.top())){
+                PushValues(values,word);
+                Math(operation,values);
+                operation.push(c); 
+            }
+            else{
+                operation.push(c);
+            }
+        }
+        if(c == '('){
+            flag = 1;
+            operation.push(c);
+            continue;
+        }
+        if(c == ')'){
+            PushValues(values,word);
+            while(operation.top() != '('){
+                if(!Math(operation, values)){
+                    return;
+                }
+            }
+            operation.pop();
+            continue;
+        }
+        if (c >= '0' && c <= '9' || c == '.' ||  c == '-' && flag == 1) {
+            word += c;
+            flag = 0;
+        }
+        else{
+            PushValues(values,word);
+        }
+    }
+    PushValues(values,word);
+}
+
+void PushValues(std::stack<double>& values,std::string& word){
+    if(!word.empty()){
+        values.push(std::stof(word));
+        word = "";
+    }
+}
 
-int Calculate(const std::string& data) {
-  return 0;
+int Rang(char c){
+    if(c == '+' || c == '-')return 1;
+    if(c == '*' || c == '/')return 2;
+    if(c == '^')return 3;
+    return 0;
 }
diff --git a/homework_01/task_02/src/utils.hpp b/homework_01/task_02/src/utils.hpp
index f1bceeb..7b42a9a 100644
--- a/homework_01/task_02/src/utils.hpp
+++ b/homework_01/task_02/src/utils.hpp
@@ -1,7 +1,11 @@
 #pragma once
 
 #include <string>
-#include <string_view>
 #include <vector>
-
-int Calculate(const std::string& data);
+#include <stack>
+#include <cmath>
+double Calculate(const std::string& data);
+void Search(std::string str,std::stack<char>& operation, std::stack<double>& values);
+int Rang(char c);
+bool Math(std::stack<char>& operation, std::stack<double>& values);
+void PushValues(std::stack<double>& values,std::string& word);