Question

2{4[7+4(5.3-9)]-3(40-8)}

Answer 1

2(4(7 + 4(5,3 - 9)) - 3(40 - 8))
= 2(4(7 + 4(- 3,7)) - 3 x 32)
= 2(4(7 - 14,8) - 96)
= 2(4(- 7,8) - 96)
= 2(- 31,2 - 96)
= 2(- 127,2)
= - 254,4