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

$m^3-11m^2+m-11$

$\left(2x-1\right)\left(x-1\right)+9\left(x+5\right)$

$y'-7y=e^{-7x}$

$\int7x\cos\left(2-x^2\right)dx$

$\lim_{x\to3}\left(\frac{x^3+5x^2+x}{x^2-2x}\right)$

$\int\frac{10x-40}{\left(x^2-3x+2\right)\left(x-6\right)}dx$