2[10a+3a{4+2(2a+3a-4b)+8}]
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Given,
2[10a+3a{4+2(2a+3a-4b)+8}]
=2[10a+3a{4+2(5a-4b)+8}]
=2[10a+3a{4+10a-8b+8}]
=2[10a+3a{12+10a-8b}]
=2[10a+36a+30a^2-24ab]
=2[46a+30a^2-24ab]
=92a+60a^2-48ab
Hope it helps you.....
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