FOIL
(-4k-4)(-8k-2)
32k^2+40k+8
-30x^2y^4+25xy^2-15
5(-6x^2y^4+5xy^2-3)
x^2-9x-10
(x-10)(x+1)
28xy+21x^2-16y-12x
(7x-4)(4y+3x)
(-7x+7)(-x-6)
7x^2+35x-42
72xy-90x+27
9(8xy-10x+3)
n^2+2n-48
(n-6)(n+8)
35ab-20a^2-42b+24a
(5a-6)(7b-4a)
(-2x^2+2x-7)(8x^2+2x-2)
-16x^4+12x^3-48x^2-18x+14
-52k^4+76k^2-12k+8
4(-13k^4+19k^2-3k+2)
5v^2+43v+56
(5v+8)(v+7)
40xz-15yc-25xc+24yz
(5x+3y)(8z-5c)
(-2n^2-8n-6)(6n^2+n-1)
-12n^4-50n^3-42n^2+2n+6
24x^6y^3+18x^4z^4+6x^7-66x^3z^4
6x^3(4x^3y^3+3xz^4+x^4-11z^4)
7n^2-46n-21
(7n+3)(n-7)
49xy+5+35x+7y)
(7x+1)(7y+5)
(8m-3n)(8m+3n)
64m^2-9n^2
-99xy^5z-11x^2y^4+11xy^4+88xy^2z
11xy^2(-9y^3z-xy^2+y^2+8z)
9x^2-94xy+40y^2
(9x-4y)(x-10y)
7xc+32yf-4xf-56yc
(x-8y)(7c-4f)