(x+2)²
3(n+1)-n
3+2(n-1)
4(4n+5)
2(n-2)
2n+(x)(x)
2x²-4x+3x-6
2(x+y+1)
2n+6
-3+4(n-1)
16n+20
2x+2y+2
3+2[(2)(n)-2]
2n-4
2n+3
4n-7
(2x+3) (x-2)
4n-2(n-3)
x²+4x+4
x²+2n
