* (3x2)-4x(-1x4)
6-4x4
6-16
-10

*[(-3)x(-4)x(-2)]+1
[12x(-2)]+1
-24+1
-23

*(3x6-2)x(-8-2+5)
(18-2)x(10+5)
-16x15
-240

*-(-2)+[-3+(-2x(-4)]
2+[3+8]
2+3+8
13