$\frac{\left(\frac{1}{cos\left(x\right)}-tan\left(x\right)\right)}{csc\left(x\right)}$

$2x^5+3x^4+8x^3+11x^2-4$

$\frac{dy}{dx}+\frac{y}{x}=4x$

$\int_{\pi}^{\sqrt{x}}\left(\sin\left(x\right)^2\right)dx$

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

$\lim_{x\to\infty}\left(\frac{\left(x+1\right)^x}{\left(x+2\right)^x}\right)$

$\csc^2-\cot^4=\csc^2+\cot^2$