I've been having trouble figuring out some functions of Maple 18 specifically related to polar and cartesian integrals. My questions exactly would be; how does one go about translating a cartesian integral into a polar integral and just about most things related to polar and cartesian interactions/conversions.

For an example I have a double integral of 9xy^2 dxdy with bounds a= -sqrt(a^2-y^2) b= 0 c= 0, d= 1.

How exatcly do I use all of the available Maple functions to help me get to my answer?

Thanks in advance. Any help is appreciated.