(x ) (x)
(a+b) (a-b)
a(a+1)
x2+3x-5x2+x
2( a2 -b)
(m+8) (m+8)
6m( m+3n)
8x+5y-3+10x+3
15m -5+9-10m
(x+2) (x-3)
a2-b2
6m2 + 18 mn
2a2 -2b
x2-x-6
m2+32m+64
x2
5m+4
-4x2+4x
18x+5y
a2+a
