Question

15-(-3){4-7-3}/3[{5+(-3)*(-6)}] 7-3has bar on it

Answer 1

15-(-3){4-7-3}/3 [{5+(-3)×(-6)}]

15-(-3){-6}/3 [{5+18}]

$15 - ( - 3) \times \frac{ - 6}{3} \times 23 \\ \\ 15 + 3 \times ( - 2) \times 23 \\ \\ 15 - 138\\ \\ - 123$