Whats the first step in evaluating this expression?

3 x [9 - (4+2) ÷ 2]

Parenthesis

(18)

Explanation:

3 · [9 - (4+2) ÷ 2]

= (3)(9 + −3)

= (3)(9) + (3)(−3)

= 27 − 9

= 18

(f - g)(x) = 5x^3 - 3

step-by-step explanation:

rearrange these functions vertically, with like terms in separate columns:

f(x) = 5x^3 - 2

g(x) =         +1

now subtract, column by column:

(f - g)(x) = 5x^3 - 3