Shùxuéjiāmen huā le jǐ bǎi nián cái zhèngmíng le zhège dìnglǐ.
Mathematicians spent hundreds of years to prove this theorem.
Tips
grammar
The suffix 家 (jiā) turns a field of study into a practitioner: 数学家 (mathematician), 科学家 (scientist), 艺术家 (artist), 作家 (writer). It implies mastery and respect.