Question #1500

Expand and simplify
5w[sup]2[/sup]x[sup]4[/sup]y[sup]7[/sup](3w[sup]4[/sup]x[sup]2[/sup] - x[sup]6[/sup]y[sup]2[/sup] + 2w[sup]4[/sup]y[sup]-7[/sup]).

Expert's answer

5w^{2}x^{3}y^{7}(3w^{4}x^{2} - x^{6}y^{2} + 2w^{4}y^{-7}) = 5w^{2}x^{3}y^{7}* 3w^{4}x^{2} - 5w^{2}x^{3}y^{7}* x^{6}y^{2} + 5w^{2}x^{3}y^{7}* 2w^{4}y^{-7}= 15w^{6}x^{5}y^{7} - 5w^{2}x^{9}y^{9} + 10w^{6}x^{3}

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