1) ( - 2 A^2 B^3 ) ^ 3 = - 8 A^6 B^9
2) ( 0,5 A B^2 ) ^ 2 = 0,25 A^2 B^4
3) ( - 8 A^6 B^9 ) * ( 0,25 A^2 B^4 ) = ( - 2 A^8 B^13 )
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4) ( - 3 A^2 B^3 )^4 = 81 A^8 B^12
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5) ( - 2 A^8 B^13 ) : ( 81 A^8 B^12 ) = ( - B / 40,5 )