$-5x^4+4x^2-6x^5+7x^3;\:x=2$

$y+9y-3$

$\left(\frac{y}{2}+x\right)\left(x-\frac{y}{2}\right)$

$\left(1+sinx\right)^2+\left(1-cosx\right)^2-2tanx\cdot cosx$

$\int senxsec\left(cosx\right)^3dx$

$\sqrt{\sqrt[3]{64m^6n^{12}d^{-18}}}$

$x^2\left(90x+45y^4-120x^3y-30x^7y^2\right)$