14又(2/3)+11又(2/5)-(-12又(2/3)-14+(-11又(2/5))
=(44/3)+(57/5)+(38/3)-14-(57/5)
=(44/3)+(38/3)-14
=(82/3)-14
=(82-42)/3
=40/3
=13又(1/3)
14又(2/3)+11又(2/5)-(-12又(2/3)-14+(-11又(2/5))
=(44/3)+(57/5)+(38/3)-14-(57/5)
=(44/3)+(38/3)-14
=(82/3)-14
=(82-42)/3
=40/3
=13又(1/3)