$2m^2d^2-6m^3-3d+d^3$

$\int\left(\frac{6sec\left(x\right)tan\left(x\right)}{\sqrt{9sec^2\left(x\right)-9}}\right)dx$

$\int\frac{1}{p\sqrt{7-p^2}}dp$

$\int\cot^43xdx$

$-7xy^3z^2+3x^2yz^3+7x^2yz^3-13xy^3z^2$

$5r\:+\:3\:-\:2r$

$\int\frac{\log\left(\log\left(x\right)\right)}{x}dx$