Answer:
20
Step-by-step explanation:
3³ - 3² + 3 - 1
27 - 9 + 3 - 1
30 - 9 - 1
30 - 10
= 20
[tex]\tt{}20[/tex]
[tex]\tt{} {3}^{3} - {3}^{2} + 3 - 1[/tex]
[tex]\tt{}(3 \times 3 \times 3) - (3 \times 3) + 3 - 1[/tex]
[tex]\tt{}27 - 9 + 3 - 1[/tex]
[tex]\tt{}20 \\ [/tex]
