34 - 14 = 310 - 15 = 16 + 13 = 18 + 12 = 3- 17 =
53= 56 + 34 = 413+37-413+47 = 23 + 311 - 23 =
49 + 29 = 38 +0.625= 56 - 23 = 14 - 15 = 112=
1- 512 = 2.5- 45 = 1- 38 - 18 = 56 -( 56 - 38 )=