$a\left(x\right)=-3x^2\:-\:5x$

$\frac{dy}{dx}\left(x^{\frac{1}{3}}-y^{\frac{1}{3}}=1\right)$

$x^4-x^2+2$

$\lim_{x\to0}\left(\frac{x^2-4x+4}{x^2-x-2}\right)$

$\lim_{x\to\infty}\left(\frac{2x-1}{x\left(x-1\right)}\right)$

$\csc28\cdot\sin65$

$\left(2a-b\right)\left(8a^3+b^3\right)\left(4a^2+2ab+b^2\right)$