Answers

2016-07-19T13:20:21+08:00
6 to the 9th power-2 cube a to the 6th power/ 1673616-8a to the 6th power


4 cube r to the 12th power-3cube s to the 6th power/ 64r to the 12th power-27s to the 6th power


6cube d to the 9th power+7cube e to the 12th power/ 216d to the 9th power+343e to the 12th power
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