Hi Jim,
Well, at the risk of getting shot, I'll try to take this one on. First, my daughter had a similar problem in math and I think the solution goes something like this. Four squared is 16 times four is 64 plus 44 is 108 minus 4 is 104 minus 4 is 100. It's some kind of tricky thing like that that uses four seven times as I just did.
On the spelling issue, make sure you turn on grammar checking in word and this should catch homonyms such as he was using. I think it's under preferences or something like that in the menus.
Good luck and 73.
Kevin, K7RX
Kevin Nathan, Adaptive Technologist
Idaho Commission for the Blind & Visually Impaired