Answer:
-5np - r² + m + 45n - 6
Explanation:
1) Eliminate redundant parentheses
m + 5n · (9 - p) - 6 - 1r²
2) Rearrange terms
m + 5n · ( - p + 9 ) - 6 - 1r²
3) Distribute
m - 5np + 45n - 6 - 1r²
4) Rearrange terms
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