1.

Simplify : `8m-[3m-{3m-{2m+3-2(4m-4)}]`

Answer» `[3m-{2m+3-2(4m-4)}]`
`=8m-[3m-{(2-8)m+(3+8}]`
`8m-[3m-{-6m+11m}]`
`=8m-[3m+6m-11]`
`=8m-[9m-11]`
=8m-9m+11=11-m


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