$\frac{5x^3+8x^2+3x+18}{-x^2-2}$

$2\cos^2\left(x-1\right)$

$1+\sin\left(x\right)\:=\frac{\cos^2\left(x\right)}{1-\sin\left(x\right)}$

$\frac{dy}{dx}=\frac{\left(x-1\right)\left(x-2\right)\left(y+3\right)}{\left(x-1\right)\left(y-2\right)\left(y+3\right)}$

$\int\frac{\csc\sqrt{x}}{3\sqrt{x}}dx$

$x=3.581x\sin\left(45\right)$

$n+2=-13$