$2x^2-5x=-2$

$\lim_{x\to0}\left(\sqrt{4x^2-x^4}\right)$

$\lim_{x\to1}\left(\frac{2-x}{\left(x-1\right)^2}\right)$

$\frac{dy}{dx}\left(\frac{\left(cosx\right)^{x^2}}{\left(x^3+3\right)^4}\right)$

$\frac{x-5}{x-7}\le m$

$x\left(x-1\right)dy=ydx$

$\frac{3x^3+2x^2-11x-10}{3x+5}$