$\lim_{x\to\infty}2x^3+nimx-7$

$6-2\left[x+5\left(3x-4\right)\right]+2\left(9x-5\right)$

$-4x^3y-4xy^3+5;\:x=2;\:y=-1$

$2y^2\:-\:6y\:-\:8\:=\:0.$

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

$\int_0^{\infty}e^{\frac{-x}{2}}dx$

$4a^2+24a+37=0$