(a-b)^4
(a+b)^3
(-9$x^{2}$ -2x +3)(3 $x^{3}$ - $x^{2}$ -3x +1)
(27$x^{2}$ + 18x - 1)(3 $x^{3}$ - $x^{2}$ -3x +1)(3x-1)
-(-8)+(-6)-(+7)
3+3/3+3
-3.33/(80/9)
(1-x)(1+x)
(-1/3)^2 -9
$\infty$ $\pi$