Calculate First Set: First, we need to calculate the expression inside the first set of parentheses: 25−42+1. 42 equals 16. So, 25−16+1 equals 25−16 which is 9, plus 1 equals 10.
Calculate Second Set: Next, we calculate the expression inside the second set of parentheses: 91−89. This simplifies to 2.
Find Product: Now, we find the product of the results from the first two steps: 10×2. This equals 20.
Subtract 12: Finally, we subtract 12 from the product we found in the previous step: 20−12. This equals 8.
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