1/2-1/3-1/4=2/3-1/4-1/6=1/8-1/4-1/2=пж помагите

Question

1/2-1/3-1/4=
2/3-1/4-1/6=
1/8-1/4-1/2=
пж помагите

Answer 1

1/2-1/3-1/4=(6-4-3)/12= -1/12
2/3-1/4-1/6=(2x4-3-2)/12=3/12=1/4
1/8-1/4-1/2=(1-2-4)/8= -5/8