simplify 3×5√32+4×3√125−3×4√81+√100
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3×5√32+4×3√125−3×4√81+√100
= 15√16×2+12√25×5-12×9+10
= 15×4√2+12×5√5-108+10
= 60√2+60√5-98
=2(30√2+30√5-49)
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