①（12分之7-6分之5-4分之3）×60
=60*7/12-60*5/6-60*3/4
=35-50-45
=-60
②|-14分之5|×（-7分之2÷14分之3)
=5/14 * (-2/7*14/3)
=- 5/14 * 4/3
=-10/21