Сократите дробь:
\(\vphantom{\frac{0^0}{0}}1)\ \frac{a(x+2)}{b(x+2)};\)
\(2)\ \frac{4(a-6)^2}{(a-6)^3};\)
\(3)\ \frac{c^3(c-4)^5}{c^6(c-4)^3};\)
\(\vphantom{\frac{0^0}{0}}4)\ \frac{2a+2b}{7(a+b)};\)
\(\vphantom{\frac{0^0}{0}}5)\ \frac{7x-21y}{5x-15y};\)
\(\vphantom{\frac{0^0}{0}}6)\ \frac{4a-20b}{12ab};\)
\(\vphantom{\frac{0^0}{0}}7)\ \frac{6x+12}{6x};\)
\(\vphantom{\frac{0^0}{0}}8)\ \frac{a-5b}{a^2-5ab};\)
\(9)\ \frac{y^2-25}{10+2y};\)
\(10)\ \frac{a^2+4a+4}{9a+18};\)
\(11)\ \frac{c^2-6c+9}{c^2-9};\)
\(12)\ \frac{m^3+1}{m^2-m+1}.\)