$\frac{\tan\left(x\right)}{\csc\left(x\right)+\cot\left(x\right)}-\frac{\tan\left(x\right)}{\csc\left(x\right)-\cot\left(x\right)}=-2$

$m^{-\frac{5}{4}}$

$2+6-9-12+4$

$\frac{d}{dx}x\cdot y=\sqrt{x^2+y^2}$

$4y'-4e^{2x}y=0;\:y\left(0\right)=6$

$20y^2-y-12$

$w^2+2w=15$