Kaeru - To Change, to Revise
おかねを どこで かえりますか？> Okane-wo dokode kaerimasuka? > Where can I change my money?
Kakaru – To use time, money
よんじゅごふん くうこおへ いて かかります ＞ Yon-ju-go-fun kuukou-e ite kakarimasu > It will take 45 minutes to go to the airport.
Omoidasu - To remember
I cannot remember at all.
わたしは なんでもない おもいだしません！ > Watashi-wa nan-demo nai omoidashimasen!
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These are for my own memory just as much as yours. Again I will need to double check my grammar on them.