Problem: what is the average of xx , 2 x 2 x , and 66 ?
Rationale: "by the definition of an average , we get : x + 2 x + 63 = 3 x + 63 x + 2 x + 63 = 3 x + 63 = 3 ( x + 2 ) 3 = x + 2 . = 3 ( x + 2 ) 3 = x + 2 . hence , the answer is x + 2 x + 2 or option c"
annotated_formula: multiply(divide(divide(multiply(2, add(2, const_1)), const_2), 2), 2)