$\sqrt{25x}^4y^5$

$\sin\left(a\right)+\csc\left(a\right)^2\sin\left(a\right)^2+\cot\left(a\right)^2+3$

$\int\frac{x+1}{e^{x}}dx$

$\lim_{x\to-\infty}\left(\frac{3x^2+2x+1}{\sqrt{x^4-x^2+x}}\right)$

$\int\:\frac{ln\left(9x\right)}{x^7}dx$

$4\cos^4x-4\cos^2x+1=1-\sin^22x$

$7x+13=34$