please give explanation
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1.(-1/2-7/9)-(-11/36)
(-9-14/18)+11/36
-23/18+11/36
-46+11/36
-55/36
=-1.5277
2.(2/3+3/7)- -5/7
14+9/21+5/7
23/21+5/7
23+15/21
38/21
=1.8095
3.(9/-10--7/23)+10/23
-207+70/-230
-137/-230
137/230
=1.6788
mark it as Brainlest answer
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