1. The problem statement, all variables and given/known data [tex]\int\int x^3(x^2+y^2)[/tex] dy dx limts of x between 2 and -4 and y limits between 5 and 0 2. Relevant equations 3. The attempt at a solution i get an answer -17426 2/3 which doesn't seem right plugged the formula into maple and has given me an answer of -5860. my first step was to expand the brackets. to get [tex]\int\int x^5 + x^3y^2[/tex] then integrate with respect to dy. put the limits of y in as 5 and 0. [tex]\int 5x^5 + (125x^3/3)[/tex] then integrate with respect to x and again put the limits in.