负的四十羡差二分之一除以(六分之一告派春减去十四分之三加上三分之二减去七分之二)=-1/42÷(1/6-3/14+2/3-2/7)=-1/42÷(7/42-9/42+28/42-12/42)=-1/42÷(14/袜耐42)=-1/42×42/14=-1/14