Question 266222
{{{(b^4)(b^(-6))^(-1)=(b^4)(b^((-6)(-1)))=(b^4)(b^6)=b^(4+6)=b^10}}}



So {{{(b^4)(b^(-6))^(-1)=b^10}}}



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{{{(b^2)^(-2)=b^(2(-2))=b^(-4)=1/b^4}}}



So {{{(b^2)^(-2)=1/b^4}}}