$-21m^2n+83mn^3-64mn-14m^2n+35mn^3+59m^2n$

$2348=8$

$b^2-2b-24$

$360\cdot29,7$

$\lim_{x\to\infty}\left(\frac{x}{sin\left(x\right)+tan\left(x\right)}\right)$

$\left(10x^2y^3+9\right)\left(10x^2y^3-20\right)$

$y^2\frac{dy}{dx}=\frac{8xe^{-y}}{\left(x+4\right)\left(x-7\right)}$