$\int2x\cdot\left(x^2+3\right)^4dx$

$\sqrt{9}\cdot\left(\sqrt{28}\cdot\sqrt{63}\right)$

$\frac{\sin\left(270+x\right)+\cos\left(90+x\right)}{\csc\left(360+x\right)+\sin\left(180-x\right)}$

$\int e^{u^3}dx$

$\frac{x^5-+4x^2}{x+3}$

$\left(4a-\frac{1}{4}\right)^4$

$x^0y^{-3}$