a^2-2ab+b^2-c^2a^2+b^2-2ab-14m^2-9n^2+6np-p^2ac^2(2b+3c)^2-ab^2(3c+2b)^2因式分解,
a^2-2ab+b^2-c^2
a^2+b^2-2ab-1
4m^2-9n^2+6np-p^2
ac^2(2b+3c)^2-ab^2(3c+2b)^2