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Based on an answer to the duplicate question, the following, using $PreRead and $PrePrint, meets my needs, interpreting both x // "t" or x; "t" for annotations. annotStyle[t_] := Text@Style[Style[t, Darker@Blue, Larger], Larger] annotLine[t_, x_] := If[Characters[t][[-1]] == " ", {annotStyle[t], x}, {annotStyle[t], annotStyle[Style[": ", Bold]], x}] ...


You can have a list like so: sol = Solve[a x^2 + b x + c == 0, x] $$\left\{\left\{x\to \frac{-\sqrt{b^2-4 a c}-b}{2 a}\right\},\left\{x\to \frac{\sqrt{b^2-4 a c}-b}{2 a}\right\}\right\}$$ see ReplaceAll for details list = x /. sol $$\left\{\frac{-\sqrt{b^2-4 a c}-b}{2 a},\frac{\sqrt{b^2-4 a c}-b}{2 a}\right\}$$ an use parts of your list, see Part: ...

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