log(5)35+2log(1/2)根号2-log（5）1/50-log(5)14
=log(5)35+log(1/2)2-log（5）1/50-log(5)14
=log(5)[35/(1/50)*14]+log(1/2)2
=log(5)125+log(1/2)2
=3-1
=2