$\lim_{x\to0}\left(\frac{x-\tan\left(x\right)}{\sin\left(x\right)}\right)$

$\frac{dy}{dx}=\frac{x\sqrt{1-y^2}}{y\sqrt{x^2+1}}$

$\left(0.625\right)^5-8\left(.625\right)^4+44\left(.625\right)^3-91\left(.625\right)^2+85\left(.625\right)-26$

$a+ax=b$

$4x+5>2x+9$

$\:5x+12\:con\:x=2$

$\frac{4x^2+9x-4}{x+3}$