63 – (–3) {–2 – 8 – 3} ÷ 3{5 + (–2) (–1)}
–1820
62
–28
63
Explanation:
63 – (–3) {–2 – 8 – 3} ÷ 3{5 + (–2) (–1)}
= 63 – (–3) {–2 – 8 – 3} ÷ 3{5 + 2}
= 63 – (–3) {–2 – 8 – 3} ÷ 3 × 7
= 63 – (–3) × (–13) ÷ 3 × 7
= 63 – 39 ÷ 3 × 7
= 63 – 13 × 7
= 63 – 91
= –28