$\int\sec\left(\frac{x}{2}\right)\tan\left(\frac{x}{2}\right)dx$

$-6x^2y+12x^2y$

$\left(2x-3y\right)\left(x+2xy-3y\right)$

$\frac{dy}{dx}\left(x+\sqrt[3]{y}+6y=9\right)$

$\frac{d^2}{dx^2}\left(ln\left(3x^2+5\right)\right)$

$\frac{d^2}{dx^2}6$

$3-2\left(-5\right)\left(2+3\left(-4+3\right)\right)$