-3y-7.8=-9.6
16ax + 4x^2 +16a^2
4*2x*3x^2y
(xsquare -ysquare)z + (ysquare-zsquare)x
6x + 3y = 30
2*(x + 1) = 10002
6b-3=15
8*x - 5 = 7995
$(-11)^{-4}$
5 x -2=3x+2