the ^ means to the power of
asks to factor
Substitute X = Y³
AKG's suggestion, replace Y3 with X is the best start. Once you do that you will have X2+ 124X- 125 (because Y6= (Y3)2), To factor that, think about the different possible ways to factor 125.
(And don't forget to put Y3 back into the answer in place of X.)
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