$8x+4-2x-3$

$\frac{d}{dx}\left(3\cos\left(-2x+\sin\left(x\right)\right)\right)$

$\frac{dy}{dx}=\left(2x^2y^2+3xy^2\right)$

$\sqrt{\frac{c^2-x^2}{c^2+x^2}}$

$\left(4+8-3+9\right)-4-\left(4+7-3-2\right)+\left(12+5-2\right)$

$8x+36\le80$

$\sqrt{4x^2-7x+15}-\sqrt{2x^2+5x-3}$