Hi everyone

I have a question regarding to symbolic expressions.

For example: I have two symbolic equations.

y = (x1/L1)+P1

z = (x2/L2)+P2

where all the variables in these two equations are symbolic parameters.

Is there a way to define these variables as symbolic parameters in Mathematica same as the way using "syms" function in Matlab? Then I can do expansion and simplification when I add, subtract, multiply or divide these equations.

These two equations are just simple examples, I have some very complicated equations which I need to manipulate with.

Can anyone help me and give me advice please.

Thank you very much

Tommy