5/14+18/35+(1 1/4-5/14):(5/12)*2

1) 5/14+18/35=(5*5+2*18)/70=61/70.

2) 5/4-5/14=(7*5-5*2)/28=25/28.

3) 25/28:5/12*2=(25*12*2)/(28*5)=600/140=300/70

4)61/70+300/70=361/70=5¹¹/₇₀.