Respuesta :

14f+-70.774227
This was solved on mathpapa.com
-7 × 3e= -21e; -7×2f= -14f; -7 × 4= -28; -21e - 14f - 28 + 6e - 2;  -15e - 14f - 30.
The answer is -15e - 14f - 30

Hope this helps :)