@@ -0,0 +1,190 @@
+class MainClass%0A%7B%0A    public static void main(String%5B%5D args)%0A    %7B%0A        int i = 10 + + 11 - - 12 + + 13 - - 14 + + 15;%0A %0A        System.out.println(i);%0A        // 75 as -(-x) = x%0A    %7D%0A%7D%0A

Create trick.java