$1.98\:-\:\left(2.5\:+\:3.2\right)$

$61.5+55.5$

$\frac{dy}{dx}\left(xln\left(y\right)+yln\left(x\right)=2\right)$

$\frac{4}{2}\cdot\frac{5}{1}$

$\frac{dy}{dx}=\frac{25x^4}{4y^5}$

$\left(x^3\right)^2\left(x^4\right)^3$

$1-\frac{\cos\left(x\right)}{\cot\left(x\right)\csc\left(x\right)}$