$\frac{dy}{dx}=2xe^{-3y}cos\left(3x\right)$

$\left(2x+3\right)\left(2x-3\right)=135$

$\lim_{x\to0}\left(\frac{\sqrt{3}\left(\sin\left(x\right)-x\right)}{3x^3}\right)$

$\log\left(8\right)=\log\left(4z\right)$

$\int_1^0\left(\frac{x^3}{x^2+2x+1}\right)dx$

$5n+2n$

$\left(-x-8\right)^2$