evaluate -12/5+(-7/20)+3/14+1/7-1/10
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First,LCM of 5,20,14,7 and 10 is 140.
Now, ( -336+(-49)+30+20-14)/140
=( -336-49+30+20-14)/140
=( -399+50)/140
= -349/140
Now, ( -336+(-49)+30+20-14)/140
=( -336-49+30+20-14)/140
=( -399+50)/140
= -349/140
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