from the sum of l-m+2n,3l-2m+n and 4l+5m-6n, subtract the sum of l+m+n and 2l+3m+4n
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Answer:
5l - 2m - 8n
Step-by-step explanation:
l - m + 2n + 3l - 2m + n + 4l + 5m - 6n
= l + 3l + 4l + 2n + n -6n - m - 2m + 5m
= 8l - 3n + 2m
l + m + n + 2l + 3m + 4n
= l + 2l + m + 3m + n + 4n
= 3l + 4m + 5n
8l - 3n + 2m - 3l - 4m - 5n
= 5l - 2m - 8n
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