3 +  5 = error there are to many spaces in the equation
70 / 12 = 5
80 - 20 = 60
700 / 100 = 7
10 * 15 = 150
 82 -- 5 = error there are to many spaces in the equation
 * 89 92 = error there are to many spaces in the equation
 a + b = error there are to many spaces in the equation
** 12 % 15 = the sign is in the  wrong position
6+5 = the sign is in the  wrong position
------- = the sign is in the  wrong position
9 / 0 = the sign is in the  wrong position
6 - 10 = -4
 = error there are to many spaces in the equation
7.8 * 2.3 = 17.94
**************** = the sign is in the  wrong position
18  + 17 = error there are to many spaces in the equation
-7 + -9 = the sign is in the  wrong position
-10 * -12 = the sign is in the  wrong position
-13.45 / 7.62 = the sign is in the  wrong position
250.4 - 17.9 = 232.5
5 / 0 = 232.5