1−x¹⁸c⁶ =(1-х⁹с³)(1+х⁹с³)=(1-х³с)(1+х³с+х⁶с²)(1+х³с)(1-х³с+х⁶с²)
1-x^18c^6=1-(x^9c³)²=(1-x^9c³)(1+x^9c³)=(1-(x³c)³)(1+(x³c)³)=
(1-x³c)(1+x³c+x^6c²)(1+x³c)(1-x³c+x^6c²).
1−x¹⁸c⁶ =(1-х⁹с³)(1+х⁹с³)=(1-х³с)(1+х³с+х⁶с²)(1+х³с)(1-х³с+х⁶с²)
1-x^18c^6=1-(x^9c³)²=(1-x^9c³)(1+x^9c³)=(1-(x³c)³)(1+(x³c)³)=
(1-x³c)(1+x³c+x^6c²)(1+x³c)(1-x³c+x^6c²).