This code that I have tried always shows an error, I have seen that it works on youtube but not for me. It say "Error using sym>convertChar (line 1546)"
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syms x t s X F
F=laplace('diff(x(t),t,t)+7*diff(x(t),t)+10*x(t)=20',s);
F=subs(F,{'laplace(x(t),t,s)'},{X});
F=subs(F,{'x(0)','D(x)(0)'},{5,3});
X=solve(F,'X');
x=ilaplace(X);
pretty(x);
ezplot(x,[0 10]);
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