$\lim_{x\to-\infty}\left(1.5+5e^{-7x}\right)$

$64x^6-796$

$\lim_{x\to1}\left(\frac{\left(x^3-9x^2+8\right)}{x-1}\right)$

$\frac{3x^3+3x^2-21x+4}{x-2}$

$x^2-16x+48$

$\lim_{x\to\pi}\left(\frac{e^x-e^{\pi}}{sin\left(x\right)}\right)$

$x\:sin\left(\frac{y}{x}\right)\left(y\right)^'=ysin\left(\frac{y}{x}\right)+x$