[Haskell] evaluate function as a string

[Ay Joselito]

Hello!
I am new to Haskell. I want to develop an application 
in which the user enters a mathematical equation,
presumably as a string (any arbitrary equation, using
any of the standard mathematical operators : +,*,^,
etc, and any of the standard functions: sin, exp,
etc.). I need to take that string, convert it to a
real function, and evaluate it.
Thank you.




		
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