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a)(-2)*2*(-3⅛)*⅕=5/2
b)(-0,1)*x*10xy²=-1x²y²
c)(-a)*6x²y*(-5y)*(-0,4)=-12ax²y²
d)½*x*x*x*(-2y)*(-y)*(-y)=-1x³y³
e)½ababababab*(-2)=-1a⁵b⁵
f)(-1)*(-1)*(-1)*xyxy*(-1)=x²y²
g)(-3)²*(-3)*a²bb*(-3)=81a²b²
h)6mn²*⅓m³*(-2)*n=-4m⁴n³