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For integers x and y define * by$$x * y = (x + y)^2 - (x - y)^2$$ and $$x \triangle y = (x + y)^3 + (x - y)^3$$, then $$(3 * 5) * (1 \triangle 2) =$$
13 X 240
12 X 260
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13 X 480
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