Ms. Agee is cool
2x2+6x
2x(x+3)
15x3-5xy3
5x(3x2-y3)
*k2-121*
(k+11)(k-11)
2+4n
2(1+2n)
*25a2-9*
(5a+3)(5a-3)
*16r2-25*
(4r+5)(4r-5)
*4a2-9*
(2a+3)(2a-3)
*9u2-v2*
(3u+v)(3u-v)
*16-x2*
(4+x)(4-x)
xy+3y
y(x+3)
*81x2-121y2*
(9x+11y)(9x-11y)
a7b+ac
a(a6b+c)
*81-a4*
4x2+12x
4x(x+3)
25m4+5m6
5m4(5+m2)
81a8b+9ac
9a(9a7b+c)
*9x6y8-4z4*
(3x3y4+2z2)(3x3y4-2z2)
12v3+6t
6(2v3+t)
*144x2-25y2*
(12x+5y)(12x-5y)
*169a16b20-1*
(13a8b10+1)(13a8b10-1)
8m7n2-16mn4
8mn2(m6-2n2)
27z2+9z4
9z2(3+z2)
3p3-6p2q
3p2(p-2q)
90x4yz+9x7y2
9x4y(10z+x3y)
x3y5+xy7
xy5(x2+y2)