I need help with the following question.

"Change into an equivalent polar integral, then evaluate the polar integral."

Given: [-4 to 0][0 to (-4x-x^2)^.5] 2x+3y/x^2+y^2 dxdy

I changed the equation to 2rcos(theta)+3rsin(theta)/r^2 r dr d(theta)

... reduces to 2cos(theta) + 3sin(theta) dr d(theta)

My limits came out to [pi to 4pi/3] and [0 to -2/cos(theta)]

I am really having a problem trying to understand what to change the limits to and why.

Any help would be very much appreciated.