=-2/3+3/4-1/2+1/6
=1/12-6/12+2/12
=-3/12=-1/4
-2/3 - -3/4 - 1/2 + 1/6
= -2/3 + 3/4 -1/2 + 1/6
= -8/12 + 9/12 - 6/12 + 2/12
= -3/12
= -1/4
`-2/3 - -3/4 - 1/2 + 1/6`
`= -2/3 + 3/4 -1/2 + 1/6`
`= -8/12 + 9/12 - 6/12 + 2/12`
`= -1/4`
-2/3--3/4-1/2+1/6=-2/3+3/4-1/2+1/6
=-8/12+9/12-6/12+2/12
=1/12-6/12+2/12
=-5/12+2/12
=-3/12
=-1/4
=3
-2/3--3/4-1/2+1/6=-2/3+3/4-1/2+1/6
=-8/12+9/12-6/12+2/12
=1/12-6/12+2/12
=-5/12+2/12
=-3/12
=-1/4