$\frac{1}{3}e^x+\frac{5}{3}e^{-2x}+\frac{1}{3}e^x-\frac{10}{3}e^{-2x}$

$\frac{x^2+x+4}{x-1}$

$\int\frac{2x^2+x+16}{\left(x^2+17\right)\left(x+1\right)}dx$

$\left(2\sqrt{y-3}\right)\left(2\sqrt{y+3}\right)$

$-4.9x^2+17.667x$

$y=-\frac{1}{2}x^2+5x-8;\:x=-2$

$4y^2-56y+196$