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Fractions and parentheses

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I need help with solving the problems in the attachment.

2/3-1/4

7/12-1/4

-2/3+1/4

4x2

3-(8-9)

2x4+4-3(1-2)

(a+b)(a-b)

b-c__
2b-a

ac+bc

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Solution Summary

This provides examples of working with fractions and parentheses.

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