Cause they are actually kicking my ass....

Here's the expression:
70 14 4 5 15 3 / * - - / 6 + =

I came up with -18

Work:
(70 / 14) - 4 - 5 * (15 / 3) + 6
(5) - 4 - 5 * (5) + 6
1 - 25 + 6
-24 + 6
-18

Anybody got any input?