Two Subscript/Superscript questions

Question

In mathematica code, I have a table of quantities that involve subscripts and superscripts. I need to put short text titles in the first row of the table. Suppose I have index1="A", index2="B", and index3="C", where A, B, and C are undefined symbols. (Later I might change A, B, and C to different symbols like $\mu,\nu$, and $\gamma $.)

Question 1. I desire an output of $\Gamma_{BC}^A \dot{x}^B\dot{x}^C$. I want to use an expression using index1, index2, and index3. I have tried things like ToExpression["$\Gamma_{index2 index3}^{index1}\dot{x}^{index2} \dot{x}^{index3}$"].

Question 2. I desire an output of $\partial_B$ $g_{CA}$ + $\partial_C$ $g_{AB}$. As above, I have tried many variations of $\partial_{index2}$ $g_{index3 index1}$ + $\partial_{index3}$ g$_{index1 index2}$.

Answer 1

Style[Row[{Subsuperscript[\[CapitalGamma], #2 #3, #1], 
      Superscript[OverDot[x], #2], 
      Superscript[OverDot[x], #3]}] & @@ {A, B, C}
  , 20] // TraditionalForm

$\Gamma _{B C}^A\dot{x}^B\dot{x}^C$

---

Style[Row[{Subscript[\[Delta], #2], Subscript[g, #2 #3], " + ", 
      Subscript[\[Delta], #3], Subscript[g, #1 #2]}] & @@ {A, B, C}
  , 20] // TraditionalForm

$\delta _Bg_{B C}\text{ + }\delta _Cg_{A B}$