$-4x^2-8x+5$

$\sqrt[2]{64\:x^{16\:}y^{26}}$

$\lim_{x\to\frac{1}{2}}\left(\frac{6x^2-x-1}{4x^2-4x-3}\right)$

$\int\frac{x^4}{x^3-3x^2+3x-1}dx$

$\lim_{x\to4}\left|\frac{\left(x^2-16\right)\sin\left(x-4\right)}{2x^5-5x-12}\right|$

$3y^4-2x^3y+4x^3-5y^4x+3;\:x=-2;y=-3$

$\frac{d}{dx}\left(x^2+6\right)^{\left(x^2+3\right)}$