a) -6 x 5 = Cloze (1): -30-6-490-2 JXUwMDc1JXUwMDFlJXUwMDAz

b) 7 x Cloze (2): -30-6-490-2 JXUwMDc1JXUwMDE5 = - 28

c) -3 x -3 = Cloze (3): -30-6-490-2 JXUwMDYx

d) Cloze (4): -30-6-490-2 JXUwMDc1JXUwMDFm x -9 = 18

 e)  -12 - ( Cloze (5): -30-6-490-2 JXUwMDc1JXUwMDFi ) = -6

 f)   8 + (-11) - (-3)= Cloze (6): -30-6-490-2 JXUwMDY4