Taking symbolic variables out of txt file and making a matrix

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Mirroyal Ismayilov
Mirroyal Ismayilov 2019-2-17
I have a txt file containing following characters.
theta1 , l1 and others are symbolic variables.( Don't mind about it)
M=[theta1 + (l1^2*m1)/4 + l1^2*m2 (l1*l2*m2*cos(fi1 - fi2))/2 ;
(l1*l2*m2*cos(fi1 - fi2))/2 theta2 + (l2^2*m2)/4 ]
I need to take it out and make it a symbolic matrix. As you can see txt file is already fine for making matrix but I don't want to copy paste the whole thing to script, I rather want to do it automatically.
fid = fopen('a.txt');
MMatrix=textscan(fid,'%s');
fclose(fid);
I tried the code above but it turn out to be not useful. What do you think is the way to copy the whole thing and use it for matrix making?

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