$\left(3x\:-\:\frac{2}{3}\right)^2$

$\frac{d^3}{dx^3}\left(e^x+\sin\left(x\right)\right)$

$\int\left(x+3\right)\cdot\cos\left(x^2+6x\right)dx$

$-36=18$

$\frac{sinx}{1+cosx}+\frac{1-cosx}{sinx}$

$\sin\left(\frac{\pi}{2}-\frac{\pi}{3}\right)$

$\frac{dy}{dx}=\frac{x}{y\left(x^2-1\right)}$