$\int\frac{\left(\sqrt{x^2-1}\right)}{x^2}dx$

$-2.25+\left(-8.3\right)$

$in\left(x+y\right)cosx-cos\left(x+y\right)sinx=siny$

$\frac{yx}{\sqrt{1+y^2}\left(1-\sqrt{1+y^2}\right)}=\frac{dx}{dy}$

$x+3\left(3x^4+7x^3+2x^2-2x-1\right)$

$7x-11y;\:x=5;\:y=7$

$\int_0^2\left(n^x\tan\left(n^x\right)\right)dx$