diff --git a/src/compile.c b/src/compile.c
index 357d617..50d4251 100644
--- a/src/compile.c
+++ b/src/compile.c
@@ -1,8 +1,15 @@
 #include <stdlib.h>
+#include <stdbool.h>
 #include <string.h>
 
 #include "syntax.h"
 
+void string_append(char** string, char* append) {
+	int len = strlen(*string);
+	*string = realloc(*string, len + strlen(append) + sizeof(char));
+	strcpy(*string + len, append);
+}
+
 void compile_enter_tag(char** string) {
 	int len = strlen(*string);
 	*string = realloc(*string, len + 3 * sizeof(char));
@@ -19,10 +26,52 @@ void compile_exit_tag(char** string) {
 	string[0][len + 2] = '\0';
 }
 
-void string_append(char** string, char* append) {
-	int len = strlen(*string);
-	*string = realloc(*string, len + strlen(append) + sizeof(char));
-	strcpy(*string + len, append);
+bool compile_isop(char* string) {
+	if (strcmp(string, "+") == 0) return true;
+	else if (strcmp(string, "-") == 0) return true;
+	else if (strcmp(string, "*") == 0) return true;
+	else if (strcmp(string, "/") == 0) return true;
+	else return false;
+}
+
+char* compile_expression(tSyntaxElement* syntaxelement) {
+	char* result = calloc(1,sizeof(char));
+	string_append(&result, "(");
+	switch (syntaxelement->type) {
+		case TOKEN:
+			string_append(&result, syntaxelement->content.string);
+			break;
+		case STRING:
+			string_append(&result, "\"");
+			string_append(&result, syntaxelement->content.string);
+			string_append(&result, "\"");
+			break;
+		case TREE:
+			if (se_istraversable(syntaxelement)) {
+				if (syntaxelement->content.syntax->type == TOKEN) {
+					tSyntaxElement* token = syntaxelement->content.syntax;
+					if (compile_isop(token->content.string)) {
+						char* operator = token->content.string;
+						while (1) {
+							if (token->next != NULL) {
+								string_append(&result,token->next->content.string);
+								if (token->next->next != NULL) {
+									string_append(&result,operator);
+								}
+								token = token->next;
+							} else break;
+						}
+					}
+				}
+			}
+			break;
+		case NEWTREE:
+		case NONE:
+			free(result);
+			return NULL;
+	}
+	string_append(&result, ")");
+	return result;
 }
 
 char* compile(tSyntaxElement* syntaxtree) {
@@ -37,7 +86,7 @@ char* compile(tSyntaxElement* syntaxtree) {
 				string_append(&result, "set ");
 				string_append(&result,token->next->content.string);
 				string_append(&result,"=");
-				string_append(&result,token->next->next->content.string);
+				string_append(&result,compile_expression(token->next->next));
 				compile_exit_tag(&result);
 			}
 		}