N(x+y-c) mn(x+y+z) n(x+y+c) a(b+c) mn(x+y-z)

To simplify each expression, I will distribute and combine like terms where necessary:

1. n(x+y-c) = nx + ny - nc

2. mn(x+y+z) = mnx + mny + mnz

3. n(x+y+c) = nx + ny + nc

4. a(b+c) = ab + ac

5. mn(x+y-z) = mnx + mny - mnz