Remove strings from summary

SamyPesse · SamyPesse · commit 26f70392ee74 · 2014-04-01T19:28:56.000-07:00
diff --git a/SUMMARY.md b/SUMMARY.md
@@ -5,8 +5,4 @@
 * [Numbers](numbers/README.md)
     * [Creation](numbers/create.md)
     * [Basic Operators](numbers/operators.md)
-* [Strings](strings/README.md)
-    * [Creation](strings/create.md)
-    * [Concatenation](strings/concat.md)
-    * [Splitting](strings/split.md)
 
diff --git a/numbers/operators.md b/numbers/operators.md
@@ -1,13 +1,13 @@
 # Operators
 
-You can apply operations to numbers using some basic operators like: 
+You can apply mathematic operations to numbers using some basic operators like: 
 
 * **Addition**: ```c = a + b```
 * **Subtraction**: ```c = a - b```
 * **Multiplication**: ```c = a * b```
 * **Division**: ```c = a / b```
 
-You can use parentheses just like in math to separate calcul execution.
+You can use parentheses just like in math to separate calcul execution: ```c = (a / b) + d```
 
 
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