$\int\left(tan^3xsec^4x\right)dx$

$\int\pi d\pi$

$\log\left(8x+1\right)=\log\left(x^2+1\right)$

$y'+y\cos x=4\cos x$

$\left(1^4\right)^{\sqrt{3}}$

$ydx+\left(y\cos\left(\frac{x}{y}\right)-x\right)dy=0$

$\lim_{x\to\frac{\pi}{2}}\left(\frac{4x^2-\pi^2}{\cos\left(x\right)}\right)$