subtract the sum of -9/14 and5/7 from the sum of 11/28 and -3/7
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-9/14 + 5/7
LCM OF 14,7=14
5×2/7×2=10/14
-9/14+10/14 = -9+10/14
=1/14
11/28 + (-3/7)
LCM OF 28,7 = 28
-3×4/7×4=-12/28
11/28+(-12/28)=11-12/28
=-1/28
-1/28-1/14
LCM OF 28,14 = 28
1×2/14×2=2/28
-1/28-2/28=-1-2/28
=-3/28
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