2х(а+в)+а(а+в)=(а+в)(2х+a);
3х+3у-бх-бу=3(х+у)-б(х+у)=(х+у)(3-б)
(2^4*7^3)/(7*2)^2= (2^4*7^3)/7^2*2^2=2^2*7^1=4*7=28
(7^7*2^5)/14^5=(7^7*2^5)/(7*2)^5=(7^7*2^5)/7^5*2^5=7^2=49
(3^7*4^4)/12^4=(3^7*4^4)/(3*4)^4=(3^7*4^4)/(3^4*4^4)=3^3=27
(а-1)³+8а⁶ = (а-1)³+(2а²)³ = ((а-1)+2а²)((а-1)²-(а-1)*2а²+(2а²)²) = (а-1+2а²)(а²-2а+1-2а³+2а²+8а⁴) = (2а²+а-1)(8а⁴-2а³+3а²-2а+1)