26.92:23 68:17 57:19 52:26 96:24 68:34 64:16 44:11 66:33+99:9 88:22+15.6 65:(213-200)・10 84:12・(307-300)

92:23 = 4
68:17 = 4
57:19 = 3
52:26 = 2
96:24 = 4
68:34 = 2
64:16 = 4
44:11 = 4
66:33+99:9 = 2 + 11 = 13
88:22+15.6 = 4 + 90 = 94
65:(213-200)・10 = 65:13*10 = 5*10 = 50
84:12・(307-300) = 7*7 = 49