有無咩math 書/course係可以 train到個人諗數/學proof 讀左1013exam太standard 就算有a range都無咩用咁因為上堂講既好多深野,e.g.FTC果d proof,唔同theroem既proof都唔係太睇得明 感覺一直識apply math去不停計永遠都唔會有進步個人諗野都好似無咩分別