Question

Ayuda doy corona y corazon

Answer 1

Respuesta:

[(4+2+1) + (13+9-20)] - [(-3 +5-21 ) - ( 18-15+6)

[( 7) + (2)] - [( -19) - (9)

[ 9 ] - [ -28]

9 + 28

37

12 - [(6-4) + (8-15)] - [4 - (3+2)-(1-7)

12- [2 - 7 ] - [ 4 - 5 +6 ]

12 + 5 - 5

12

-[-8+(4-2)+(2-5-7)] + [(6-3) - (2-5-6) - 12]

-[-8 + 2 -10 ] + [ 3 + 9 - 12 ]

- [-16 ] +  0

+ 16