diff --git a/compiler.h b/compiler.h
index be9973f..cbdaddd 100644
--- a/compiler.h
+++ b/compiler.h
@@ -45,6 +45,16 @@ struct pos
     case '.':                            \
     case '?'
 
+#define SYMBOL_CASE \
+    case '{':       \
+    case '}':       \
+    case ':':       \
+    case ';':       \
+    case '#':       \
+    case '\\':      \
+    case ')':       \
+    case ']'
+
 enum
 {
     LEXICAL_ANALYSIS_ALL_OK,
diff --git a/lexer.c b/lexer.c
index 8ff7c3a..3937c19 100644
--- a/lexer.c
+++ b/lexer.c
@@ -193,8 +193,7 @@ void read_op_flush_back_keep_first(struct buffer *buffer)
     }
 }
 
-const char *
-read_op()
+const char *read_op()
 {
     bool single_operator = true;
     char op = nextc();
@@ -240,6 +239,15 @@ static void lex_new_expression()
     }
 }
 
+static void lex_finish_expression()
+{
+    lex_process->current_expression_count--;
+    if (lex_process->current_expression_count < 0)
+    {
+        compiler_error(lex_process->compiler, "Closed expression that was never opened\n");
+    }
+}
+
 bool lex_is_in_expression()
 {
     return lex_process->current_expression_count >= 0;
@@ -265,6 +273,18 @@ static struct token *token_make_operator_or_string()
     return token;
 }
 
+static struct token *token_make_symbol()
+{
+    char c = nextc();
+    if (c == ')')
+    {
+        lex_finish_expression();
+    }
+
+    struct token *token = token_create(&(struct token){.type = TOKEN_TYPE_SYMBOL, .cval = c});
+    return token;
+}
+
 struct token *
 read_next_token()
 {
@@ -280,6 +300,10 @@ read_next_token()
         token = token_make_operator_or_string();
         break;
 
+    SYMBOL_CASE:
+        token = token_make_symbol();
+        break;
+
     case '"':
         token = token_make_string('"', '"');
         break;
diff --git a/test.c b/test.c
index 1a1ed95..75956cb 100644
--- a/test.c
+++ b/test.c
@@ -1 +1 @@
-50 + 20 - 10 ++
+50 + 20 - 10 ++(50 + 20)[#]