8 + [6² - (2² + 4) ] - 3²

How do I solve this

A bank is getting a new marble floor that is green and white. The width of the floor is 88 feet. A white marble triangle will extend 1010 feet into the area. White marble costs $9.50$9.50 per square foot. How much will the white marble section cost?

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Simplify the following questions: 7f-5 (4f+9)