$5y\left(a-2\right)+x\left(a-2\right)n^2+16nm+64m^2$

$\frac{1}{\sin\:\left(y\right)}dx+\frac{1}{\cos\:\left(x\right)}\left(x\right)dy=0$

$\left(-5h^2k^7\right)^3$

$45m^6-80d^8$

$8x^2+38x-10=0$

$3x^3y=x^3-x\frac{dy}{dx}$

$\frac{d}{dx}\left(x+\frac{ln\left(x\right)}{x}\right)$