$\:18x+24$

$\frac{2}{3}\sqrt[3]{\frac{27x^2}{16a^2b^4}}$

$\frac{d}{dx}\left(\frac{x^2\left(x+5\right)}{\left(x-4\right)^4}\right)$

$\frac{-14x^8y^4}{49x^3y^5}$

$3a^3+6a^2+9a$

$\left(-8\right)-\left(-1\right)-\left(+3\right)+\left(-5\right)+\left(+9\right)$

$6\left(36m^6n-g^6\right)$