$\left(\frac{sin\left(u\right)}{cos\left(u\right)}\right)\left(\frac{cos\left(v\right)}{cos\left(v\right)}\right)-\left(\frac{cos\left(u\right)}{cos\left(u\right)}\right)\left(\frac{sin\left(v\right)}{cos\left(v\right)}\right)$

$xydy-\left(x^2+y^2\right)dx=0$

$-\frac{5}{5}ab^2-\frac{1}{2}ab^2+ab^2-\frac{8}{8}ab^2$

$3\:-\:\:2\:-\:3\:-\:\left[\:-\:2\:+\:\left(1\:+\:3\right)\right]\:-\:3$

$\int_4^6\left(\sqrt{x}^2-10\right)dx$

$\left[\left(-14\right)\:-\:\left(-10\right)\right]\:-\:\left[\left(-16\right)\:-\:\left(+8\right)\right]\:=\:$

$\frac{cos\left(\theta\:\right)tan\left(\theta\:\right)}{csc\left(\theta\:\right)-cot\left(\theta\:\right)}$