Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you may not be able to execute some actions.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
3-3x6+2=3+(-18+2)=3+(-16)= -13..
3-3x6+2= 3-18+2= 3-{(+18) +(+2)}=3-20= -17..