diff --git a/LICENSE b/LICENSE
index 261eeb9..abebc40 100644
--- a/LICENSE
+++ b/LICENSE
@@ -35,7 +35,7 @@
       "Work" shall mean the work of authorship, whether in Source or
       Object form, made available under the License, as indicated by a
       copyright notice that is included in or attached to the work
-      (an example is provided in the Appendix below).
+      (an example is provided in the Appword_endix below).
 
       "Derivative Works" shall mean any work, whether in Source or Object
       form, that is based on (or derived from) the Work and for which the
@@ -116,7 +116,7 @@
           of the NOTICE file are for informational purposes only and
           do not modify the License. You may add Your own attribution
           notices within Derivative Works that You distribute, alongside
-          or as an addendum to the NOTICE text from the Work, provided
+          or as an addword_endum to the NOTICE text from the Work, provided
           that such additional attribution notices cannot be construed
           as modifying the License.
 
@@ -169,19 +169,19 @@
       License. However, in accepting such obligations, You may act only
       on Your own behalf and on Your sole responsibility, not on behalf
       of any other Contributor, and only if You agree to indemnify,
-      defend, and hold each Contributor harmless for any liability
+      defword_end, and hold each Contributor harmless for any liability
       incurred by, or claims asserted against, such Contributor by reason
       of your accepting any such warranty or additional liability.
 
-   END OF TERMS AND CONDITIONS
+   WORD_END OF TERMS AND CONDITIONS
 
-   APPENDIX: How to apply the Apache License to your work.
+   APPWORD_ENDIX: How to apply the Apache License to your work.
 
       To apply the Apache License to your work, attach the following
       boilerplate notice, with the fields enclosed by brackets "[]"
       replaced with your own identifying information. (Don't include
       the brackets!)  The text should be enclosed in the appropriate
-      comment syntax for the file format. We also recommend that a
+      comment syntax for the file format. We also recommword_end that a
       file or class name and description of purpose be included on the
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
diff --git a/homework_01/task_01/src/utils.cpp b/homework_01/task_01/src/utils.cpp
index a6989bd..efb8022 100644
--- a/homework_01/task_01/src/utils.cpp
+++ b/homework_01/task_01/src/utils.cpp
@@ -1,7 +1,40 @@
 #include "utils.hpp"
 
+#include <iostream>
 #include <stack>
 
 std::vector<std::string> SplitString(const std::string& data) {
-  return {};
+  std::vector<std::string> out;
+  size_t word_start;
+  size_t word_end = 0;
+  bool in_brackets = false;
+  size_t opening_bracket = 0;
+ 
+    while ((word_start = data.find_first_not_of(' ', word_end)) != std::string::npos)
+    {
+      if (data[word_end]==')'){
+        in_brackets = false;
+        word_end += 1;
+        out.push_back(data.substr(opening_bracket, word_end - opening_bracket));
+        continue;
+      }
+      if (in_brackets == 1){
+        word_end += 1;
+        continue;
+      }
+      if (data[word_start]=='('){
+        opening_bracket = word_start;
+        in_brackets = 1;
+        continue;
+      }
+      if (data[word_start]=='\t'){
+        word_start += 1;
+      }
+      word_end = data.find(' ', word_start);
+      if (data.find('\t', word_start) < data.find(' ', word_start)){
+        word_end = data.find('\t', word_start);
+      }
+      out.push_back(data.substr(word_start, word_end - word_start));
+    }
+    return out;
 }
diff --git a/homework_01/task_02/src/utils.cpp b/homework_01/task_02/src/utils.cpp
index ebc7ffc..d32b266 100644
--- a/homework_01/task_02/src/utils.cpp
+++ b/homework_01/task_02/src/utils.cpp
@@ -3,5 +3,23 @@
 #include <stack>
 
 int Calculate(const std::string& data) {
-  return 0;
-}
+    int a, b, result;
+    result = 0;
+    a = data[0]-'0';
+    b = data[2] - '0';
+    switch (data[1]){
+    case ('+'):
+        result = a + b;
+        return result; 
+    case ('-'):
+        result = a - b;
+        return result; 
+    case ('*'):
+        result = a * b;
+        return result; 
+    case ('/'):
+        result = a / b;
+        return result; 
+    }
+    return 0;
+}
\ No newline at end of file