$( x + 8 ) ( x - 3 )$

$\lim_{x\to x}\left(7x^4-2x^3-8x+5\right)$

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

$4x+32+yx+8y$

$x\cdot\left(x+6\right)$

$\frac{3x^3-2x^4-1-x^2}{x-12}$

$\int1\cdot sin\left(ln\left(x\right)\right)dx$