[tex] \huge \boxed{\mathbb{QUESTION} \downarrow}[/tex]
[tex] \large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}[/tex]
[tex] \sf \: 19 m - 14 - 3 ( 3 m + 7 )[/tex]
Use the distributive property to multiply -3 by 3m+7.
[tex] \sf \: 19m-14-9m-21 [/tex]
Combine 19m and -9m to get 10m.
[tex] \sf \: 10m-14-21 [/tex]
Subtract 21 from -14 to get -35.
[tex] \boxed{\boxed{\bf \: 10m-35 }}[/tex]