Oblicz: a)-5x(-7)+(-6)x9-(-5)x(-6)= b)9x8+(-4)x(-7)-(-10)x(3)= c)-5x(-4)-(-3)x8+(-6)x7= d)-1x(-2)x(-2)+(-4)x7x(-3)= X=Pomnożyć
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a) 35-54-30= -49
b) 72+28+30= 130
c) 20+24-42=2
d)-4+ 84= 80