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

$\left(\frac{7}{5}x^3-y^{2m-1}\right)\left(\frac{7}{5}x^3+y^{2m-1}\right)$

$49x^{16}-16$

$5\left(4p+3k-8\right)$

$9v^2+3v+8v^2-v^3$

$\left(+8\right)+\left(-13\right)-\left(-12\right)+\left(-17\right)-\left(-3\right)$

$\int_0^t\left(e^{-5t}sen\left(7t\right)\right)dt$