Question: Example expressions generated from this language look like: ( c + d ) - e + f a * * * * b + -

Example expressions generated from this language look like:
(c+d)-e+fa****b+-c+(f**g)(d+c)**e+f(a-b)+c**d
Given the expression (d+c)**e+f, draw its parse tree,
If you wanted to add numbers to the language, whar would you need to add to the BNF? Write up the new BNF for this expanded language.

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