$\frac{2}{\sqrt{t}}+\frac{6}{\sqrt[3]{t}}$

$-1+9+4+13-17-20+2$

$\int8xe^{-4x}dx$

$\left(\frac{7}{5}a^{2}b^{3}c^{4}+\frac{15}{14}b^{4}c\right)$

$\frac{1-\cos\left(-x\right)}{\sec\left(-x\right)-1}=\cos x$

$\frac{\left(m^{-2}n^3p^4\right)^{-2}\left(mn^{-2}p^3\right)^4}{\left(mn^{-2}p^3\right)^{-4}\left(mn^2p\right)^{-1}}$

$\int\left(\sqrt{9-3x}\right)dx$