Vのを手伝う (help with action)
grammar1 sentence
The pattern verb-clause + のを + 手伝う, 'help [someone] do X.' のを nominalizes the action; 手伝う takes it as object. 宿題のを手伝う doesn't appear — 手伝う takes either a noun (宿題) or a の-nominalized verb phrase.
End of results — 1 loaded.