[tex]\it a)\ \ (2\cdot3)^3=6\cdot6\cdot6=216\\ \\ (2\cdot3)^3=2^3\cdot3^3=8\cdot27=216\\ \\ \\ b)\ \ (2\cdot7)^2=14^2=14\cdot14=196\\ \\ (2\cdot7)^2\ =2^2\cdot7^2=\ 4\cdot49=196\\ \\ \\ c)\ \ (2\cdot3\cdot5)^2=30^2=900\\ \\ (2\cdot3\cdot5)^2=2^2\cdot3^2\cdot5^2=4\cdot9\cdot25=100\cdot9=900[/tex]
