package pl.krajan.sendbox;

public class MyFirstProgram {

    public static void main(String[] args) {

        System.out.println("Hello, world");
    }
}
@@ -141,16 +141,149 @@
 world%22);
+%0A%0A        System.out.println(2+2);%0A        System.out.println(2*2);%0A        System.out.println(2-2);%0A        System.out.println(2/2);
 %0A    %7D%0A%7D

add mathematic