Find the first, second, and third derivative of the following function.

h(x)=(2x6)7\displaystyle {h}{\left({x}\right)}={\left({2}{x}-{6}\right)}^{{7}}

h(x)=\displaystyle {h}'{\left({x}\right)}=  

h(x)=\displaystyle {h}{''}{\left({x}\right)}=  

h(x)=\displaystyle {h}{'''}{\left({x}\right)}=