$\lim_{x\to0}\left(\frac{x^2-2x-4}{x^3-1}\right)$

$6b+6b^2+4b^3$

$\frac{3a^xb^m}{ab^2}$

$\lim_{x\to1}\left(e^{\frac{1}{1-x}}ln\left(x\right)\right)$

$\int_0^{\infty}85\left(\frac{e^x}{e^{2x}+3}\right)dx$

$\lim_{x\to\infty}\left(\sqrt{x+2\sqrt{x}}-\sqrt{x}\right)$

$6.61-2.83$