(65m2 - 169m +91) - (24m2 – 36m - 8)
Expand
= 65m2 - 169m + 91 - 24m2 + 36m + 8
rearranging
= 65m2 - 24m2 - 169m + 36m + 91 + 8
= 41m2 - 133m + 99
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