• Try partial fractions -BeLe- ♀ (0 bytes) () 10/13/2019 postreply 21:42:25
• 好像沒得簡化 -眼鏡- ♂ (64 bytes) () 10/13/2019 postreply 21:47:02
• 簡化 -燕子飛回來_88- ♀ (34 bytes) () 10/13/2019 postreply 21:48:37
• 是可以 -眼鏡- ♂ (0 bytes) () 10/13/2019 postreply 21:50:25