$\csc x-\cot x=\sin x$

$x^2+12x+11=0$

$\csc\left(x\right)-\sin\left(x\right)=\cot\left(x\right)\cdot\cos\left(a\right)$

$\frac{1-sinx}{cosx-sinx\cdot cos}$

$\left(m^3f^4+3\right)\cdot\left(m^3f^4-3\right)$

$-4\left(4-2+5\right)-1$

$\left(1+e^x\right)\frac{dy}{dx}=e^{x-y}$