$\frac{\left(-3\right)\left(-2\right)}{-2+5}$

$\left(\frac{1}{3}x^2-\frac{2}{5}y^3\right)\left(\frac{1}{3}x^2+\frac{2}{5}y^3\right)$

$-9-1+2$

$\frac{1}{2}\left(4\cdot5\right)-2^3$

$18x^2-24xy+8y^2$

$\frac{s^2}{2\sec\:\left(a\right)\cot\:\left(a\right)}$

$\frac{dy}{dx}\left(y=\sqrt[3]{\frac{x\left(x-5\right)}{x^2+9}}\right)$