$7x^2+21x-28>0$

$\int\left(\arcsin\left(9x\right)\right)dx$

$\frac{d}{dx}\left(y\cdot e^{-x}-y^3-3x\right)$

$\lim_{x\to0}\left(1+\sin\left(2x\right)\right)$

$\frac{\left(3a^4\:b^2\:c^3\right)^2}{\left(3a^-2\:b^5\:c\right)\:^3}$

$2\log_{10}\left(y\right)-3\log_{10}\left(x\right)=2$

$8x\:+\:4y\:=\:4\left(2x\:+\:y\right)$