Respuesta :

1) 3 (7) - 5 (4) = 1

2) 7 (2) - 4 (2) + 3 (2) = 12

3) 2 (7) - 7 (4) - 8 (3) = -38

4) 3 (7) - 6 (4) + 9 (3) = 24

I’m pretty sure these are correct.