if [ [ x ] ] = x ^ 2 + 2 x + 4 , what is the value of [ [ 7 ] ] ?
"these functions questions might look intimidating , but they just test your knowledge about how well you can substitute values [ [ x ] ] = x ^ 2 + 2 x + 4 [ [ 7 ] ] = 7 ^ 2 + 2 * 7 + 4 = 67 . option d"
add(add(power(2, 2), multiply(2, 2)), 4)