1.

The rational number we get after simplification will be 2/3+-4/5+7/15+-11/20

Answer»

2/3+-4/5+7/15+-11/20

lcm of 3, 5, 15, 20

The LCM of 5 ,10, 15, 20 is 60.

(40-48+28-33)/60

-13/60

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