$\int\left(\frac{20}{100x^2+1}\right)dx$

$\lim_{x\to1}\left(\frac{3\sin\pi\left(x\right)-\sin3\pi\left(x\right)}{x^3}\right)$

$\left(y^3+2z^4\right)^3$

$x-2>5$

$\frac{d^2}{dx^2}\left(2t^2+6t\right)$

$2x+7x+x-8\cdot$

$\frac{d}{dx}\left(x^x\right)\left(x+4\right)^4\left(3x-2\right)^3$