$100y^2\:\:-\:\:64z^2$

$y=6\log\left(x^2-5\right)$

$7\left(-1\right)^4\left(2\right)^2+4\left(2\right)^3\left(-1\right)^2$

$\lim_{x\to0}\left(\frac{x^2+4x}{x^6+x^2}\right)$

$\frac{d}{dx}\left(\frac{e^{2x}-2x-1}{1-cosx}\right)$

$3^2+2x-5$

$\frac{dy}{dx}-24y\left(x^2-x\right)=0$