Question

(3/1-4/1-6/5-12/7)÷(-6/1)的二次方

Answer 1

(1/3-1/4-5/6-7/12)÷(-1/6)的二次方

=(1/3-1/4-5/6-7/12)÷1/36

=(1/3-1/4-5/6-7/12)*36

=36*1/3-36*1/4-36*5/6-36*7/12

=12-9-30-21

=3-30-21

=-48