$\lim_{x\to\infty}\left(\frac{\left(3x+ln\left(x\right)\right)}{xln\left(x\right)}\right)$

$\left(-12-32-45-69-87\right)\:$

$\sec\left(x\right)\sqrt{1-\sin^2}\left(x\right)\:=1$

$6xy'-3\left(y\right)^2y-3y=0$

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

$\left(49-11\right)\cdot3$

$\int\left(x\cdot\left(x^2-1\right)^{-\frac{3}{2}}\right)dx$