starting diff eq

Hey guys, I'm just starting diff eqs in my math class and I missed that day, but I was wondering if someone could tell me where to start on this: t(dy/dt)+(1+t)y^2. I know I need to find a(t) and b(t), but I'm not sure how to start it right. Thanks for the help.

My bad, I meant t(dy/dt)+(1+t)y^2=0, and then how to separate it right.

t\left(\frac{dy}{dt}\right)+(1+t)\cdot y^2=0

[eqn]
y^{-2} \frac{dy}{dt} = \frac{-1}{t(1+t)}