298. Efectuează.

d) 10x (25:5 + 5) + 90 - (7 x 4 - 35:5)

e) 20 - (50: 5 + 5 x 0) x2 +45 + 6 x 5

f)4 x 4 + 28:7:2- (9x4:6+8:4)​