$\frac{\tan\:\left(a\right)+\cot\:\left(b\right)}{\cot\left(a\right)+\tan\left(b\right)}-\tan\left(a\right)\cdot\cot\left(b\right)$

$8x^0$

$0.25\left(-12x+8\right)-2\left(x+4\right)-5\left(x-2\right)$

$x\cdot y'+3y=\frac{1}{x}$

$-3xy^2+x^2y+\frac{2}{3}\:x^2y$

$0.3381051033-\left(\frac{-0.9999804783\left(1.3-\:0.3381051033\right)}{12.78584918+0.9999804783}\right)$

$\int\left(\frac{y^2}{\left(2y+1\right)\left(y+2\right)}\right)dx$