=(3+5/9-6/9)×[(6+4+3)/36]-[(6-4+3)/36]×3+[(6+4+3)/36]×[(6-5)/9]
=(3-1/9)×13/36-5/36×3+13/36×1/9
=13/36×3-5/36×3
=3(13/36-5/36)
=3 ×8/36
=8/12
=2/3
=(3+5/9-6/9)×[(6+4+3)/36]-[(6-4+3)/36]×3+[(6+4+3)/36]×[(6-5)/9]
=(3-1/9)×13/36-5/36×3+13/36×1/9
=13/36×3-5/36×3
=3(13/36-5/36)
=3 ×8/36
=8/12
=2/3