Answer:
Explanation:
It seems you have provided some expressions that need to be simplified. Here are the simplified versions of each expression:
1) 3(x² + 7) = 3x² + 21
2) 2s(s - 4) = 2s² - 8s
3) (w + 7)(w + 3) = w² + 10w + 21
4) (x + 9)(x - 2) = x² + 7x - 18
5) (2t - 1)(t + 5) = 2t² + 9t - 5
These are the simplified forms of the given expressions.