$\frac{\sin\left(\theta\right)}{1-\sin^2\left(\theta\right)}$

$\frac{\infty^4+3\left(\infty\right)^7-\infty-2}{4\left(\infty\right)-\infty^6-5\left(\infty\right)^2-9\left(\infty\right)^7}$

$n^2+3n=10$

$\int11x\sin\left(3x\right)dx$

$\frac{dy}{dx}+\frac{3}{2}\left(\frac{y}{x+50}\right)=20$

$\left(7x^3+8x^3\right)^4$

$2x+3<x+10$