$\lim\:_{x\to\:0}\left(\frac{1-5^{\frac{1}{x}}}{1+5^{\frac{1}{x}}}\right)$

$\frac{x^2-2y-8}{x^2-x-6}$

$\lim_{x\to\left(0\right)}\left(\frac{e^{2x}-1}{sin\left(x\right)}\right)$

$6c^3-12c^2d^2+3cd$

$\left(\frac{1}{2}+\frac{x}{z}\right)^2$

$\int\left(\sinh\left(2x\right)\right)dx$

$no\:one\:ask$