Respuesta :
(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 :)
(-10n-1)-(-7n-7n+2+2)
(-10n-1)-(-14n+4)
-10n-1+14n-4
14n-10n-1-4
4n-5
Hope this helps :)