Respuesta :

-10n - 1 - (-14n+ 4)
-10n - 1 + 14n - 4
4n - 5
(2n-12n-1)-(7n+2-7n+2)
(-10n-1)-(-7n-7n+2+2)
(-10n-1)-(-14n+4)
-10n-1+14n-4
14n-10n-1-4
4n-5

Hope this helps :)