$a^2-2^a-3\:entre\:a+1$

$2\arcsin\left(x\right)=\pi$

$\left(2x+7\right)\left(3y\right)$

$104=a+895$

$\lim_{x\to-\infty}\left(\frac{x^3-x^2-3x+2}{x^2-3x+2}\right)$

$y'-10y=0$

$\left(\frac{2}{5}m^2+\frac{1}{3}mn-\frac{1}{2}n^2\right)\left(\frac{2}{3}m^2+2n^2-mn\right)$