Question

12 + 36 - 21+7 +[56-(97-54)] - {21 + [ 12 (7+3)]}

Answer 1

Respuesta:

$12+36-21+7+\left[56-\left(97-54\right)\right]-21+\left[12\left(7+3\right)\right]}\\\\=12+36-21+7+13-21+\left[12\left(7+3\right)\right]\\\\=12+36-21+7+13-21+120\\\\=146$