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defadd(a,b):returna+bdefsubtract(a,b):returna-bdefmultiply(a,b):returna*bdefdivide(a,b):ifb==0:raiseValueError("Cannotdividebyzero")returna/bdefcalculator(operation,a,b):ifoperation=='add':returnadd(a,b)elifoperation=='subtract':returnsubtract(a,b)elifoperation=='multiply':returnmultiply(a,b)elifoperation=='divide':returndivide(a,b)else:raiseValueError("Invalidoperation")#Exampleusageprint(calculator('add',5,3))#Output:8print(calculator('divide',10,2))#Output:5.0

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