x²y-xy² = xy(x-y) = 2*2 = 4
x²+y²=(x-y)²+2xy = 2²+2*2 = 8
x³-y³ = (x-y)(x²+xy+y²) = 2(2+x²+y²) = 2(2+(x-y)²+2xy) = 2(2+2²+2*2) = 220
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x²y-xy² = xy(x-y) = 2*2 = 4
x²+y²=(x-y)²+2xy = 2²+2*2 = 8
x³-y³ = (x-y)(x²+xy+y²) = 2(2+x²+y²) = 2(2+(x-y)²+2xy) = 2(2+2²+2*2) = 220