-10的2n次方*100*(-10)2n次方-1

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-10的2n次方*100*(-10)2n次方-1
-10的2n次方*100*(-10)2n次方-1

-10的2n次方*100*(-10)2n次方-1
-102n*100*(-10)2n-1
=-102n+2n-1
=-104n-1