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

$\int_0^{\pi}4\sin\left(x\right)dx$

$\int\frac{x^3}{\sqrt{2x^4+5}}dx$

$\frac{14\pi}{6}$

$-5+3-\left(-2\right)+\left(+3\right)-\left(-7\right)$

$\left(-\:12\:700\right)\:+\:\left(-\:485\right)$

$-248x\:+76y\:+450+700x\:-\:98y\:\:+\:563$