[Request] Control of algebraic expressions CAS

[compsystems]

including a space at the beginning works, but to copy the expression to the input line fails

' + [SPC] + x^3/x^2 + ' [ENTER] '(x^3/x^2)' ok

then up to history and copy the entry into the input line [enter] -> ERROR SINTAX '(x^3/x^2')