$ A =(6888 :56 -11^2 ) .152 +13.72 +13.28 $
$ A= ( 123 -121 ).152 + 13.(72 +28 ) $
$ A = 2.152 + 13.100 = 304 +1300 = 1604 $
$ B= [ 5082 : (17^29 : 17^27 – 16^2) + 13.12] : 31 + 9^2 $
$ B = [ 5082 : (17^2 -16^2 ) +13.12] :31 +81 $
$ B = [ 5082 : 33 +13.12 ] : 31 +81 $
$ B = [ 154 +156 ] :31 +81 = 310: 31 +81 = 10 +81 = 91 $
$ C = 1024 : 2^5 + 140 : (38 + 2^5) + 7^23 : 7^21 $
$ C= 2^10:2^5 +140 : 70 +7^2 $
$ C= 2^5 + 2 +49 = 32+2+49 = 90 $