ToExpression[ToString[x^2]] does not produce $x^2$, instead it gives $x$. Please explain.
I actually wrote the following code and it gave the answer as 1.
C1 = (Subscript[x, 1][t] - Subscript[x, 0])^2 + (Subscript[y, 1][t] - Subscript[y, 0])^2 - Subscript[l, 01]^2; ToExpression[StringDelete[ToString[C1], "[t]"]]
Then I tried with $x^2$ to get $x$ only.