$\lim_{x\to\frac{\pi}{2}}\left(3e^x\cos\left(x\right)\right)$

$\int\left(\frac{4}{x^4-2x^2+1}\right)dx$

$y'+\frac{\left(5y\right)}{\left(x+7\right)}=\left(x+7\right)^9\:for\:y\left(0\right)=9$

$\left(\frac{1}{2}x^3+y\right)^3$

$\left(5m^2n+3\right)^2$

$11-\left(-4\right)\cdot\left(-9\right)$

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