$\left(3\sqrt[3]{a^2b}\right)\left(5\sqrt[4]{a^2b^5}\right)$

$5\sqrt{x^3}$

$x\frac{dy}{dx}+2y=162\ln\left(x\right)x^8$

$\frac{\left(-sin\left(x\right)-2\left(cos\left(x\right)\right)\right)}{\left(cos\left(x\right)-2sin\left(x\right)\right)}$

$49g^2-81b^2$

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

$-3\left(-4\right)\frac{5}{4}\left(-7\right)$