$\lim_{x\to\infty}\left(\frac{e^{2x}-e^{-2x}}{ln\left(x+1\right)}\right)$

$\frac{29.095}{2.3}$

$21\left(-11\right)$

$2x^2-4x+3$

$\int_0^1x^3\left(lnx\right)^3dx$

$y\left(1-x^2\right)\frac{dy}{dx}=4x\left(1-2y^2\right)$

$\left(3x^4-8x^3+8x^2+1\right)\::\:\left(3x^2-2x-1\right)$