diff --git a/homework_01/task_01/src/main.cpp b/homework_01/task_01/src/main.cpp
index 0b3dcb2..0feb697 100644
--- a/homework_01/task_01/src/main.cpp
+++ b/homework_01/task_01/src/main.cpp
@@ -1,6 +1,6 @@
 #include <iostream>
 
-#include <utils.hpp>
+#include "utils.hpp"
 
 int main() {
   for (const auto& word : SplitString("asdas das das fgag (adasd 1fas)")) {
diff --git a/homework_01/task_01/src/split_string_test.cpp b/homework_01/task_01/src/split_string_test.cpp
index 82d4994..c501970 100644
--- a/homework_01/task_01/src/split_string_test.cpp
+++ b/homework_01/task_01/src/split_string_test.cpp
@@ -11,5 +11,6 @@ TEST_CASE("SplitString", "[simple]") {
   CHECK(SplitString("??? ??") == std::vector<std::string>{"???", "??"});
   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 (a a) b (asd as)  ") ==
+        std::vector<std::string>{"a", "(a a)", "b", "(asd as)"});
 }
diff --git a/homework_01/task_01/src/utils.cpp b/homework_01/task_01/src/utils.cpp
index a6989bd..fd6150f 100644
--- a/homework_01/task_01/src/utils.cpp
+++ b/homework_01/task_01/src/utils.cpp
@@ -1,7 +1,36 @@
 #include "utils.hpp"
 
-#include <stack>
+#include <string>
+#include <string_view>
+#include <vector>
 
-std::vector<std::string> SplitString(const std::string& data) {
-  return {};
-}
+std::vector<std::string> SplitString(std::string const& data) {
+  std::vector<std::string> result;
+  std::string token = "";
+  bool brackets_condition = false;
+  for (char const& active_element : data) {
+    if (brackets_condition) {
+      token.push_back(active_element);
+      if (active_element == ')') {
+        brackets_condition = false;
+        result.push_back(token);
+        token = "";
+      }
+    } else {
+      if (active_element == ' ' || active_element == '\t') {
+        if (!token.empty()) {
+          result.push_back(token);
+          token = "";
+        }
+      } else {
+        active_data.push_back(active_element);
+        if (active_element == '(') brackets_condition = true;
+      }
+    }
+  }
+  if (!token.empty()) {
+    result.push_back(active_data);
+    token = "";
+  }
+  return result;
+};
diff --git a/homework_01/task_01/src/utils.hpp b/homework_01/task_01/src/utils.hpp
index 539ba98..5bd49fa 100644
--- a/homework_01/task_01/src/utils.hpp
+++ b/homework_01/task_01/src/utils.hpp
@@ -4,4 +4,4 @@
 #include <string_view>
 #include <vector>
 
-std::vector<std::string> SplitString(const std::string& data);
+std::vector<std::string> SplitString(const std::string& data);
\ No newline at end of file
diff --git a/homework_01/task_02/src/calculate_test.cpp b/homework_01/task_02/src/calculate_test.cpp
index 57a8cb9..eccc131 100644
--- a/homework_01/task_02/src/calculate_test.cpp
+++ b/homework_01/task_02/src/calculate_test.cpp
@@ -3,7 +3,7 @@
 #include "utils.hpp"
 
 TEST_CASE("Calculate", "[simple_sum]") {
-  CHECK(Calculate("1+2") == 3);
+  CHECK(Calculate("12+2") == 14);
   CHECK(Calculate("2+2") == 4);
   CHECK(Calculate("1+0") == 1);
   CHECK(Calculate("0+0") == 0);
@@ -17,8 +17,15 @@ TEST_CASE("Calculate", "[simple_difference]") {
 }
 
 TEST_CASE("Calculate", "[simple_multiply]") {
-  CHECK(Calculate("5*2") == 10);
+  CHECK(Calculate("52*2") == 104);
   CHECK(Calculate("2*2") == 4);
   CHECK(Calculate("1*0") == 0);
   CHECK(Calculate("0*0") == 0);
 }
+
+TEST_CASE("Calculate", "[simple_del]") {
+  CHECK(Calculate("52/2") == 26);
+  CHECK(Calculate("2/2") == 1);
+  CHECK(Calculate("0/3") == 0);
+  CHECK(Calculate("23/1") == 23);
+}
\ No newline at end of file
diff --git a/homework_01/task_02/src/main.cpp b/homework_01/task_02/src/main.cpp
index 72a6f13..6d061bd 100644
--- a/homework_01/task_02/src/main.cpp
+++ b/homework_01/task_02/src/main.cpp
@@ -1,5 +1,4 @@
 #include <iostream>
-
 #include <utils.hpp>
 
 int main() {
diff --git a/homework_01/task_02/src/utils.cpp b/homework_01/task_02/src/utils.cpp
index ebc7ffc..37a84b4 100644
--- a/homework_01/task_02/src/utils.cpp
+++ b/homework_01/task_02/src/utils.cpp
@@ -1,7 +1,39 @@
 #include "utils.hpp"
 
+#include <cstring>
+#include <iostream>
 #include <stack>
 
-int Calculate(const std::string& data) {
-  return 0;
-}
+int Calculate(const std::string &data) {
+  std::string number = "";
+  char action;
+  int variables[2];
+  int answer = 0;
+
+  for (char c : data) {
+    if (c >= '0' && c <= '9') {
+      number = number + c;
+    } else {
+      numbers.push_back(std::stoi(number_part)) number.clear();
+      if ((c == '+') || (c == '-') || (c == '*') || (c == '/')) {
+        action = c;
+      }
+    }
+  }
+
+  int_numbers[n] = atoi(number.c_str());
+
+  if (action == '+') {
+    answer = (int_numbers[0] + int_numbers[1]);
+  }
+  if (action == '-') {
+    answer = (int_numbers[0] - int_numbers[1]);
+  }
+  if (action == '*') {
+    answer = (int_numbers[0] * int_numbers[1]);
+  }
+  if (action == '/') {
+    answer = (int_numbers[0] / int_numbers[1]);
+  }
+  return answer;
+}
\ No newline at end of file