1560 : [5 . 79 - (125 + 5 . 49)] + 5 . 21
= 1560 : [395 - (125 + 245)] + 105
= 1560 : [395 - 370] + 105
= 1560 : 25 + 105
= 62.4 + 105
= 167.4
125 . (28 + 72) - 125 . (3² : 4 + 64)
= 125 . 100 - 125 . (9 : 4 + 64)
= 12500 - 125 . (2.25 + 64)
= 12500 - 125 . 68.25
= 12500 - 8531.25
= 3968.75
177 : [2 . (4² - 9) + 3² . (15 - 10)]
= 177 : [2 . (16 - 9) + 9 . 5]
= 177 : [2 . 7 + 45]
= 177 : [14 + 45]
= 177 : 59
= 3
2025 - [1200 - (4² - 2 . 3)³] : 40 . 2
= 2025 - [1200 - (16 - 6)³] : 40 . 2
= 2025 - [1200 - 1000] : 40 . 2
= 2025 - 200 : 40 . 2
= 2025 - 10
= 2015
568 - (-5) . [143 - (4 - 1)²]
= 568 - (-5) . [143 - 3²]
= 568 - (-5) . [143 - 9]
= 568 - (-5) . 134
= 568 + 670
= 1238
10 - [(8² - 48) . 5 + (2³ . 10 + 8)] : 28
= 10 - [(64 - 48) . 5 + (8 . 10 + 8)] : 28
= 10 - [16 . 5 + 88] : 28
= 10 - [80 + 88] : 28
= 10 - 168 : 28
= 10 - 6
= 4