$\lim_{x\to7}\left(x+8\right)$

$\lim_{x\to2}\left(x^2-4x+2\right)$

$a^2-100$

$\lim_{x\to-1}\left(\frac{\sqrt[3]{3x-5}-2\sqrt{2+x}-5x-1}{x^2-1}\right)$

$\int_1^{\infty}\frac{-9x-2}{\left(x+4\right)\left(x^2+1\right)}dx$

$25x^4y^2-30x^5y^3+9x^6y^4$

$\frac{30.750}{15.600}$