$\int\left(\frac{7}{x^8}\right)dx$

$\left(\sec\left(y\right)-1\right)\cos^2\left(y\right)=\sin^2\left(y\right)$

$\lim_{a\to-3}\left(a^2-3a+9\right)$

$-32\:a^4\:+\:48\:a\:^2m\:-\:80\:a\:m^3$

$c\cdot cos^2x$

$\int\frac{e^{-\sqrt[2]{x}}}{\sqrt[2]{x}}dx$

$\left(-\frac{4}{6}x^2y^3z^5\right)\left(\frac{5}{9}x^4z^2\right)$