3[4(23)-52+7(8+42)-16]
3 x (4 x 8 - 52 + 7 x (8 + 42) - 16)
3 x (32 - 52 + 7 x (8 + 42) - 16)
3 x (16 – 52 + 7 x (8 + 42))
3 x (16 - 25 + 7 x (8 + 42))
3 x (-9 + 7 x (8 + 42))
3 x (-9 +7 x (8 + 16))
3 x (-9 + 7 x 24)
3 x (-9 + 168)
3 x 159
477
