* mnożenie :)
-1,2x*(0,3x³)=-1,2x*0,3x³=(-1,2*0,3)*(x*x³)=-0,36x⁴
-⅖x*3⅓x=(-2/5)*(3 i 1/3)*(x*x)=(-2/5)*(10/3)*x²=(-20/15)x²=(-4/5)x²
7ab*6a²b=(7*6)*(a*a²)*b=42a³b
²/₇xy²z*2⅔x²y=(2/7)*(2 i 2/3)*(x*x²)*(y²*y)=(2/7)*(8/3)*x³*y³=(16/21)x³y³
(a²-a+1)÷¹/₇= (a²-a+1)*7=7a²-7a+7
