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