$\left(24+9\right)\::\:\left(\:-3\right)$

$\int\left(\frac{\left(\sqrt{x}-5\right)^2}{2\sqrt{x}}\right)dx$

$\left(-3x^2y\right)\left(4xy^2\right)$

$xy+3y-2x+5y-3xy$

$\int\left(8z\sqrt{9-8z^2}\right)dz$

$\left(x^5\:+\:7x^3\:-\:5x\:+\:1\right):\left(x^3\:+\:2x\right)\:$

$\int_{\frac{\pi}{6}}^{\frac{\pi}{4}}\left(2\sin\left(3x\right)\cos\left(2x\right)\right)dx$