%exps25.m
function f=exps25(a,T,V)
Y1=12*(a(2)+a(6)*exp(a(4)*(1./T-1/293)));
Y2=a(3)*exp(a(5)*(1./T-1/293))./(a(3)+exp(a(5)*(1./T-1/293)));
Y3=a(6)*exp(a(4)*(1./T-1/293));
Y=Y1./(a(1)+Y2+a(2)+Y3);
f=sum((V-Y).^2);