例句與造句

1. That's what me and my friend used to do . . . ( I still remember a classic : Mathematics Made Difficult, by Carl E . Linderholm, in which one of the starred, i . e . especially difficult, exercises was : " Show that 17 ?17 = 289 . Generalize this result . " I don't think I learned a thing from that particular book, other than 17? but it was sure interesting ! )  talk ) 05 : 10, 13 December 2006 ( UTC)
2. It's difficult to find mathematics made difficult in a sentence. 用mathematics made difficult造句挺難的