$\int-\sqrt{5x-5}dx$

$\int y\left(4-y^2\right)dy$

$\lim_{x\to0}\left(\ln\left(x^3\cdot e^{-3x}\right)\right)$

$\left(x+2a\right)\left(x+5a\right)$

$\lim_{x\to infinity}\left(\frac{\sqrt{x+1}}{x^2-1}\right)$

$x^2-4x-3$

$\lim_{x\to\infty}\left(\frac{lm\left(1+6x\right)}{x}\right)$