((1/7)х⁵у²)²=(1/7)²х⁵*²у²*²=(1/49)х¹⁰у⁴
(-сm⁷n³)³=-c³m⁷*³n³*³=-c³m²¹n⁹
-(-3x²y⁵)³=-(-3³x²*³y⁵*³)=27х³у¹⁵
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-х³у² *(-0,3х⁵у⁷) =0,3х³⁺⁵у²⁺⁷=0.3х⁸у⁹
-0,2а⁷b * 5a⁵b⁶=-1*a⁷⁺⁵b¹⁺⁶= -a¹²b⁷
((-3/2)b⁴c)²*(2bc³)³=((-3/2)²b⁴*²c²)*(2³b³c³*³)=9/4*8b⁸⁺³c²⁺⁹=18b¹¹c¹¹=18(bc)¹¹