double integral using composite trapezoidal rule

(x^2 2y^2 +xy^3)dxdy where the outer y limits are -1:1 the inner x limits are 0:2 and n = 2 I am trying to accomplish this on matlab, actually the assignment is to do it on matlab, the answer is supposed to be 2 with a relative error of 25% but I keep getting 8 as an answer even when I do it long hand which takes forever to do.; (x^2 2y^2 +xy^3)dxdy where the outer y limits are -1:1 the inner x limits are 0:2 and n = 2 I am trying to accomplish this on matlab, actually the assignment is to do it on matlab, the answer is supposed to be 2 with a relative error of 25% but I keep getting 8 as an answer even when I do it long hand which takes forever to do.

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