$2\left(\left(\sec\left(x\right)^2\right)+\left(\csc\left(x\right)^2\right)\right)=2\left(\sec\left(x\right)^2\right)\left(\csc\left(x\right)^2\right)$

$\frac{k^7}{k^{13}}$

$\left(5x^2\:y^3\:z\right)^2$

$\frac{dy}{dx}\left(-7xln\left(5x+2\right)\right)$

$\sin\:^2\left(y\right)+3\sin\left(2y\right)=0$

$5\left(7-x\right)=31-x$

$135+\frac{1}{2}x=143+\frac{1}{4}x$