Question

67+{50.[70:(27+8)+18:2]+21}

Answer 1

Oi...

67 + {50 × [70 ÷ (27 + 8) + 18 ÷ 2] + 21}

67 + {50 × [70 ÷ 35 + 9] + 21}

67 + {50 × [2 + 9] + 21}

67 + { 50 × 11 + 21}

67 + {550 + 21}

67 + 571

638

Espero ter ajudado.