x=?
multiply
divide
max level
50

1+2-3=x 

x=0

50

1x3x2=

6

50

100/25=

4

50

3(2+6)+9-2=

61

150

6-5+4-4.5=x  

x=.5

150

5x3x4=

60

150

126/2/3=

21

150

71-3+4(3+2)/2=

44