14(1/2+1/3+1/4) 1/3*6/7-1/7*3/4

Question

14(1/2+1/3+1/4)
1/3*6/7-1/7*3/4

Answer 1

14(6/12+4/12+3/12)=14*13/12=91/6=15целых,одна шестая 2/7–3/28=8/28–3/28=5/28