Simplifying
[2(1 + 3) + 1] * 7 + 1

Combine like terms: 1 + 3 = 4
[2(4) + 1] * 7 + 1

Multiply 2 * 4
[8 + 1] * 7 + 1

Combine like terms: 8 + 1 = 9
[9] * 7 + 1

Multiply 9 * 7
63 + 1

Combine like terms: 63 + 1 = 64
64