1. If the value of b is 7, then what is the value of expression - 35^2 + 25 = ?

A. - 122

B. 17

C. 172

D. 122

2. Simplify (x^2 + 16) (x^2 - 16) = ?

A. x^4 - 256

B. x^4 - 32

C. x^4 + 32

D. x^4 + 256

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