$\left(2a^2b+\frac{3a^n}{b^2}\right)^2$

$\left(+6\cdot684\cdot264\right)+\left(-72\right)$

$\frac{dx}{y}+\left(x^2-4x\right)dy=0$

$\frac{d}{dx}\left(\left(x+2\right)^3\left(5x-9\right)^5\right)$

$\left(z-8\right)^3$

$\int\frac{5}{x\sec\left(-1+\ln5x\right)}dx$

$144x^8+120x^4+25$