3(a5)2*(a3)2-(2a3)2*(a2)5

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3(a5)2*(a3)2-(2a3)2*(a2)5
3(a5)2*(a3)2-(2a3)2*(a2)5

3(a5)2*(a3)2-(2a3)2*(a2)5
3(a5)2*(a3)2-(2a3)2*(a2)5
=3*a^10*a^6-4a^6*a^10
=-a^16

原式=3a^10×a^6-4a^6×a^10
=-a^16