log以5为底35+2log以为底根号二-log以5为底五十分之一-log以五为底14 =log以5为底（35÷1/50÷14）+log以为底2 =log以5为底125+log以为底（1/2）^-1 =log以5为底5^3+log以为底（1/2）^-1 =3-1 =2