$\int\left(x^3+4x-1\right)cos2xdx$

$y\left(s\right)=\frac{s^2-1}{s^2\left(s+1\right)^2}$

$-5x^3-10x^2+20x$

$\lim_{x\to2}\frac{x^2-8x+12}{x-2}$

$-7000+-500+-40+-3$

$\left(\frac{10}{\left(\sqrt{3x+5}\right)+\left(\sqrt{x-3}\right)}\right)$

$\left(x-i\right)\left(x-1-i\right)$