Question

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Answer 1

First add those who have base 7 then add those who have base 3 then u have 2 terms then calculate

Concept is Power

Answer 2

Answer:-

-4/21

Step-by-step explanation:

For rearranging the fraction, always remember to group  denominator having the same number.

so ,let's rearrange the numbers with the same principle written in above .

=  -2/3+4/3+5/7-11/7

=  2/3-6/7

taking the LCM to be 21,

14/21-18/21=(-4/21)