More Practice with Functions Objectives Use function calls as values for expressions Create a function named add that takes two parameters and returns the sum. Store the result (evaluation) of the function into a variable name total Use function calls within other function calls var total = add(subtract(10,9), subtract(11,4)) Define the functions add and subtract such that the value of total is 8. Describe the differences between function expressions and function declarations. Talk to your neighbor and describe what the differences between a function expression and a function declarations are.