$\frac{4a^3-5a}{2a-1}$

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

$-5\cos^2\left(x\right)-10cos\left(x\right)=-15$

$x^2\cdot y=1+x^3$

$\sqrt{2p}.3\sqrt[5]{m^3n^4}.\sqrt[10]{x^7y^2}$

$\frac{d^3}{dx^3},si\:y=\frac{3}{\left(x-1\right)^2}$

$\left(n+3\right)\left(n+5\right)\left(mn+n^2\right)$