(3/1-4/1-6/5-12/7)÷(-6/1)的二次方

(3/1-4/1-6/5-12/7)÷(-6/1)的二次方
(3/1-4/1-6/5-12/7)÷(-6/1)的二次方

(3/1-4/1-6/5-12/7)÷(-6/1)的二次方
(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

是3除以1还是3分之1啊