(-a)^3(-a)^2(-a)+(-a)4^(-a)^2①(a-b)^n[(b-a)^n]^2②81^m*27^m-9^2*9^m*3^5m-4③[(-m^5)^2*(-m^2)^7]^2④-(2pq)^3*[-(-pq^2)]^6⑤(-3a^2)^3*a^3+(-4a)^2*a^7-(5a^3)^3⑥8^91*(1/2)^90*(1/2)^180⑦2c^3*1/4abc^2(-2ac)⑧(-3a^n+1)^2*(-2ab^n+1)^3⑨(2a^2-2/

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