Question: He secured a cavalry about five times as large as that of Alexander
Please fix the punctuation.
Fixed: [He secured a cavalry about five times as large as that of Alexander.]

Question: This does not apply to nonrefundable rates
Please fix the punctuation.
Fixed: [This does not apply to non-refundable rates.]

Question: Eightynine Free English online dictionary based on WordNet 30
Please fix the punctuation.
Fixed: [Eighty-nine - Free English online dictionary based on WordNet 3.0]

Question: Our parents and grandparents lifestyles were environmentally friendly
Please fix the punctuation.
Fixed:
[Our parents and grandparents' lifestyles were environmentally friendly.]