$\left(mn^3\right)\left(m^4n^2\right)$

$2-7d+8d$

$\int\frac{9}{\sqrt{1-x^2}}dx$

$\left(\sqrt[3]{mn}\right)^{21}.\left(\sqrt{mn}\right)^4$

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

$cos\left(-b\right)$

$22x-12y+3y-7x$