Perhaps you should try some spelling variations:
"poole equation" » "pole equation", "people equation", "cole equation"
"poll equation" » "pell equation", "pole equation", "pell equations", "polyl equation", "pooll equation", "polel equation"
"pol equation" » "poly equation", "pool equation", "pole equation"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pol equation") OR ("poll equation"))) OR ("poole equation")).
• Removing quotes may allow a broader search: (((( pol equation ) or ( poll equation ))) or ( poole equation )).
• Adding a wildcard symbol may retrieve word variants: (((("pol equation") or ("poll equation"))) or ("poole equation"))*.