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a)d*(-3)*c=-3cd
b)3(-x)(-a)=3ax
c)zy*1/2y=1/2y²z
d)2cd*(-9)*d=-18cd²
e)1/4abb*(-2a)=-1/2a²b²
f)1/2a*a*4*(-a)*(-5)=10a³
g)3xxy*(-1/6xy)=-1/2x³y²
h)-3(-x)(-x)(-y)=3x²y
i)0,2tsts do kwadratu *(-15)=-3s⁴t⁴
j)karafka=a³fk²r
k)xylometazolin=aeil²mno²txyz