Can somebody please help me with these two questions:

1) (64x)^1/3 - (25x^3)^1/2 x^-7/6

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(8x)^1/3

so far I've got to: 4x^1/3-5x^3/2 x^-7/6

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2x^1/3

2) (x^2y)^2+(xy^2)^2

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x^2+y^2

Thanks in advance.