$7 x ^ { 2 } - 14 = 0$

$\left(\frac{15}{4}-\frac{y}{2}^2\right)$

$3\left(0\right)^2-4$

$\frac{dy}{dx}\left(4\tan\left(\sqrt{y}\right)-x^2\cdot\sin^2\left(y\right)=\ln\left(x-y\right)\right)$

$\lim_{x\to0}\left(\frac{e^x-e^{-x}}{x-\frac{3}{2}\sin2x}\right)$

$f\left(x\right)=\sqrt{x^3+x^2}+\sqrt{\frac{x^2-2x}{1-x}}$