For numbers 13-15, Simplify the expression so that no negative exponents appear in the result. Assume all variables represent nonzero number. _13. (m³)(m³)(m-!) B.- m4 C. m7 D. m5 m5 14. ((2-2)(5-5))-4 A. (2®)(5²º) B. C. D. (2')(5’) (2')(5') (2®)(520) 4r³(r*)3 15. 15(r³)-2 4r21 А. 15r21 c. C.- 15 15 15r9 B.

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