3l[l-4m+5n]-4l[10n-3m+2l]
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Step-by-step explanation:
3l [ l- 4m + 5n] - 4l [ 10n - 3m + 2l]
3l² - 12lm + 15ln - 40ln - 12lm + 8l²
3l² + 8l² - 12lm - 12lm + 15ln - 40ln
11l² - 24lm - 25ln.
I hope it helps you a lot ✌️
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