$\lim_{x\to0}\left(\frac{8sinx^2}{x}\right)$

$\lim_{x\to\infty}\left(e^{\frac{11}{x}}\right)$

$\left(2a\:-\:b-c\right)\left(2a-b+c\right)$

$\frac{d^2y}{dx^2}=-5\frac{dy}{dx}+14y$

$2cos^2\left(x\right)=3-3senx$

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

$\frac{m^3n^3-8y^{12}}{mn-2y^4}$