$\lim_{x\to\infty\:}\left(\sqrt{x^4+x}-x\right)$

$2xy-y=5x+3$

$\left(\tan\left(x\right)+\sin\left(x\right)\right)\left(\tan\left(x\right)-\sin\left(x\right)\right)$

$\sec\left(x\right)\left(\tan\left(x\right)+\cot\left(x\right)\right)=\frac{\csc\left(x\right)}{\cos^2\left(x\right)}$

$-2\cdot1-2$

$\int\frac{\left(x+2\right)}{\left(3+2x-x^2\right)^{\frac{3}{2}}}dx$

$7-\left|1+\left(9-13\right)\right|$