$-3+4-7-6-2+5\:+1$

$\frac{1}{2}\log\:_g\left(x\right)=3\log\:_g\left(3\right)$

$+375+285$

$3\tan\left(x\right)-5\csc\left(x\right)-3\sin\left(x\right)\tan\left(x\right)+5\sin\left(x\right)\sec\left(x\right)$

$3\frac{dy}{dx}=y\cdot e^{2x}-e^{2x}$

$2\left(3x-4y+7\right)$

$\frac{\tan\left(x\right)-\sin\left(x\right)\cos\left(x\right)}{sin^2\left(x\right)}=\tan\left(x\right)$