How can I solve the equation of type h ? 6 unknows 6 equations

Hello.

I would like to find out the result of the equation I mentioned below, type 'h'. For example A = 5h B = 0.65h C=.... How can I define the h. And I want to soln type h. Please answer immediately.

function fourthordereqn()
%We need solve the system forward mesh points.
%System want to solve y''(0)
%We must use 4+2=6 forward mesh points.
'f2(0)=A*f(0)+B*f(1)+C*f(2)+D*f(3)+E*f(4)+F*f(5)';
'Z0=A*f(0)';
'Z1=B*(f(0)+h*f1(0)+(h^2)/2*f2(0)+(h^3)/6*f3(0)+(h^4)/24*f4(0)+(h^5)/120*f5(0)+O*(h^6))';
'Z2=C*(f(0)+2*h*f1(0)+2*h^2*f2(0)+(2^3*h^3)/6*f3(0)+(2^4*h^4)/(4*3*2)*f4(0)+(2^5*h^5)/(5*4*3*2)*f5(0)+O*(h^6))';
'Z3=D*(f(0)+3*h*f1(0)+(3^2*h^2)/2*f2(0)+(3^3*h^3)/6*f3(0)+(3^4*h^4)/(4*3*2)*f4(0)+(3^5*h^5)/(5*4*3*2)*f5(0)+O*(h^6))';
'Z4=E*(f(0)+4*h*f1(0)+(4^2*h^2)/2*f2(0)+(4^3*h^3)/6*f3(0)+(4^4*h^4)/(4*3*2)*f4(0)+(4^5*h^5)/(5*4*3*2)*f5(0)+O*(h^6))';
'Z5=F*(f(0)+5*h*f1(0)+(5^2*h^2)/2*f2(0)+(5^3*h^3)/6*f3(0)+(5^4*h^4)/(4*3*2)*f4(0)+(5^5*h^5)/(5*4*3*2)*f5(0)+O*(h^6))';
'f(0)=0; f1(0)=0; f2(0)=1; f3(0)=0; f4(0)=0; f5(0)=0';
syms A B C D E F 
%Write the equations for
%1st eqn f(0)=0
equation1=A+B+C+D+E+F;
%2nd eqn f1(0)=0
equation2=B*h+C*2*h+D*3*h+E*4*h+F*5*h;
%3rd eqn f2(0)=1
equation3=-1+(B*h^2/2)+(C*2*h^2)+(D*3^2*h^2/2)+(E*4^2*h^2/2)+(F*5^2*h^2/2);
%4th eqn f3(0)=0
equation4=(B*h^3/6)+(C*2^3*h^3/6)+(D*(3^3*h^3)/6)+(E*4^3*h^3/6)+(F*5^3*h^3/6);
%5th eqn f4(0)=0
equation5=(B*h^4/24)+(C*2^4*h^4/24)+(D*3^4*h^4/24)+(E*(4^4*h^4)/(4*3*2))+(F*(5^4*h^4)/(4*3*2));
%6th eqn f5(0)=0
equation6=(B*(h^5)/120)+(C*(2^5*h^5)/(5*4*3*2))+(D*(3^5*h^5)/(5*4*3*2))+(E*(4^5*h^5)/(5*4*3*2))+(F*(5^5*h^5)/(5*4*3*2));
sol.a=solve(equation1,equation2,equation3,equation4,equation5,equation6);
SOLN = structfun(@double,sol.a);
disp(SOLN);

but I'm having this problem.

Undefined function or variable 'h'

[Walter Roberson]

syms h

And change your solve to list the variables you want to solve for.