简便运算；3/11*[22/4*1/3-77/46]

3/11*[22/4*1/3-77/46]
=3/11*22/4*1/3-3/11*77/46
=1/2-21/46
=23/46 - 21/46
= 1/23
23/11*[22/4*1/3-77/46]
= 23/11*22/4*1/3 - 23/11*77/46
= 23/6 - 7/2
= 23/6 - 21/6
= 1/3