$\left(x-2\right)\left(x^2+2x-1\right)$

$\int\left(-9x+2\right)^3dx$

$\lim_{x\to\infty}\left(x^3\left(\frac{4}{x}-sin\left(\frac{4}{x}\right)\right)\right)$

$-x^3+4x^2-3x$

$2x^4+10x^3+6x^2$

$\frac{2+2\cos\left(x\right)}{\sin2\left(x\right)}=\frac{\tan\left(x\right)}{1-\cos\left(x\right)}$

$\left(7a^2y^3-5x^4\right)^2$