add the following using the rearrangement property 2 /3+-4/5+-2/3+1+-11/15
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2/3-4/5-2/3+1-11/15
Here 2/3 nd -2/3 got cancelled..
Take lcm
Here lcm=15
Now..
-12+15-11/15
=-8/15
Here 2/3 nd -2/3 got cancelled..
Take lcm
Here lcm=15
Now..
-12+15-11/15
=-8/15
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