$\int\left(7x-1\right)\cos\left(7x^2-2x\right)dx$

$3^{3-1}$

$\int\frac{t^3}{\sqrt{2+t^2}}dx$

$-7z-4+2+3z$

$4\:cot\left(\frac{\pi}{2}-x\right)cos\left(x\right)$

$\int\left(\frac{\tan\left(ax\right)}{\cos\left(ax\right)}\right)dx$

$\frac{dy}{dx}\left(2csc\left(x\right)cot\left(y\right)=1\right)$