$\lim_{x\to0}\left(\frac{5x^2+\sin\left(7x\right)}{x}\right)$

$21x^2+9$

$4096=2^n$

$\frac{96x^8y^4z^2}{28x^5\:y^3\:z^2}$

$\lim_{x\to infinity}\left(\frac{cos3x}{e^x}\right)$

$\log\left(8\right)=\log\left(x+2\right)$

$\cos^2\left(x\right)\:=\:\sin^2\left(x\right)\:+\:2\cos^2\left(x\right)\:-\:1$