P
Parentheses: 2 + 4 = 6 → 3(6)² − 20 ÷ 5 + 1
E
Exponents: 6² = 36 → 3(36) − 20 ÷ 5 + 1
M
Multiply (left to right): 3 × 36 = 108 → 108 − 20 ÷ 5 + 1
D
Divide (left to right): 20 ÷ 5 = 4 → 108 − 4 + 1
A/S
Add & Subtract (left to right): 108 − 4 = 104 → 104 + 1 = 105 ✅