$2x-2x+8x$

$\int\frac{x^2+3}{x^3-6x^2-x+6}dx$

$\lim_{x\to0}\left(2\sin\left(x\right)^{8\tan\left(x\right)}\right)$

$\sin^2\left(b\right)\cdot\sec\left(b\right)\cdot\cos\left(b\right)$

$\left(4a^24\right)^2$

$\int\left(4x^6-2x^3+7x-4\right)dx$

$\int\frac{5x+18}{\left(x+4\right)\left(x+3\right)}dx$