$2xy+4ap-7ap+3xy$

$2x^2-1;x=-1$

$-\sqrt{1.6}>-\sqrt{\frac{3}{2}}$

$\frac{dy}{dx}=\frac{\left(1+2e^y\right)}{x^3e^y}$

$\sqrt[4]{a^3}\cdot\sqrt[5]{a}$

$\left(\frac{1}{9}x^{-3}y^4\right)\left(\frac{1}{7}x^3y^{-5}\right)$

$\left\{11x^2+3x-6\right\}+\left\{-3x^2+2x-1\right\}$