$\tan\left(a\right)+\cot\left(a\right)\cdot\sin\left(a\right)\cdot\cos\left(a\right)$

$7x-6y=63$

$\frac{dy}{dx}=x^2e^{\left(-x^3+y\right)}$

$\log_{10}\left(2x^2+3\right)=\log_{10}\left(x^2+5x-3\right)$

$\left(-2\right)\left(0\right)-2$

$\left(3m^{-2}n^5\right)^2$

$\frac{24x^5}{-4x^2y}$