$\frac{dy}{dt}=\frac{\left(4t+ty^2\right)}{\left(9+t^2\right)}$

$4b+5+\left(2b+7\right)+\left(8-5b\right)$

$\left(32a\:+\:5b\right)\left(a\:+\:b\right)$

$\int\:\frac{1}{\left(t+4\right)\left(t-1\right)}dt$

$18.003\cdot219$

$\left(-4+5xy^3\:\right)^2$

$y'\:=\frac{-x}{y-2x}$