$\left(-31\right)+\left(-10\right)+\left(+50\right)-\left(-6\right)$

$\lim_{x\to8}\left(\frac{7x^3+14x^2}{14x^2+28x}\right)$

$\ln\left(y\right)=\sin\left(x\right)\ln\left(x\right)$

$\int\frac{x}{\left(x^2+a^2\right)^{\frac{3}{2}}}dx$

$\left(5x^3+7\right)^2$

$2x^2+2x-24$

$2sin^2x+3cosx-3=0$