Expressions can be expressed in different ways, not just the name of the symbol involved.
Have the Wolfram Language read an expression to you:
Wolfram Language code: Speak[Subsuperscript[∫, a, b]Subscript[J, x](n)ⅆx]
Get a string of text corresponding to a spoken representation of the expression:
Wolfram Language code: SpokenString[Underoverscript[∑, i = 1, ∞]Underoverscript[∏, n = 1, ∞](ψ(n i)/a^n b^i)]Wolfram Language code: SpokenString[[image]]