Объяснение:
2-b/b+b-3/3b^3=3b²*(2-b)+b-3/3b^3=6b²-3b^3+b-3/3b^3=-3b^3+6b^2+b-3/3b^32x/5x-10-x/2-x=2x/-5*(-x+2)-x/2-x=-7x/5*(-x+2)=-7x/-5x+103a+9/6a*2a^4/a+3=3*(a+3)/3*a^3/a+3=3/3*a^3=a^3m²-n²/6n / (m-n)²=(m-n)*(m+n)/6n *1/(m-n)²=m+n/6n * 1/m-n=m+n/6n*(m-n)=m+n/6mn-6n²
