86 - [15x - 7(6x - 9) -2 {10x - 5(2 - 3x)}]

Hi Aman!
 
Here is the answer to your question.
 
86 – [15x – 7(6x – 9) – 2{10x – 5(2 – 3x)}]
= 86 – [15x – 42x + 63 – 2(10x – 10 + 15x)]
= 86 – (–27x + 63 – 20x + 20 – 30x)
= 86 – (–77x + 83)
= 86 + 77x – 83
= 77x +3
 
Cheers!

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