$\int\left(-xe^{-3x^2}\right)dx$

$3-6\cdot\:2^3+2\cdot\:\left(-4\right)^2$

$f\left(x\right)=6\sqrt[3]{x}\left(8x+1\right)$

$\left(1-\sin\left(a\right)\right)\left(1+\sin\left(a\right)\right)=\cos^2\left(a\right)$

$3\left(x-1\right)^2=1-2\left(x-1\right)$

$-8\:x\:-7$

$3y^5+5y^2$