perhaps you wanted to say:

Find the difference between the square of the sum of the first "N" numbers and the sum of the square.

there is no closing parenthesis in the first argument of the toUppercase function:

haskell toUppercase :: String -> String -> String toUppercase processedString remainingString = if (remainingString == []) then processedString else toUppercase (processedString ++ [toUpper (head remainingString)]*)* (tail remainingString)

it helped me a lot thinking about this function as just as a prefix notation of the same thing at the right of the = sign