$78^4$

$\frac{2x^3-10x^2+8x-6}{2x-1}$

$5=\:11\:+\:x$

$8.m.x^4+16.x^6+24.l.x$

$\lim_{x\to0}\left(\frac{\sin\left(\pi\cos^2\left(x\right)\right)}{\tan\left(\tan^2\left(x\right)\right)}\right)$

$\sqrt{\left(x-1\right)^3}$

$\frac{cot\left(x\right)}{sen\left(x\right)}+csc\left(x\right)cot\left(x\right)$