A、<span style="line-height: 18.88888931274414px; text-indent: 32px;">a/b/c*e*3</span>
B、<span style="line-height: 18.88888931274414px; text-indent: 32px;">3*a*e/b/c</span>
C、<span style="line-height: 18.88888931274414px; text-indent: 32px;">3*a*e/b*c</span>
D、<span style="line-height: 18.88888931274414px; text-indent: 32px;">a*e/c/b*3</span>