Can someone pls help me with this escape room, this is my last question and I just can't figure out the code. Pls help

Question

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Answer 1

1) 251 is prime

2) 2³ * 7

3) 2 * 10² * (a²)³ * (b²)³ * b

4) 3² * 5 * (a²)¹² * a * (b²)³

5) (2²) * 5 * (a²)⁵ * (b²)⁷ * b

6) (2²)³ * 2 * (a²)³ * (b³)³ * b