4x2y3z59x5y2z3
162x43y53x3.2y6
x3y+xy3x2y3+x3y2
a-ba+ba3-b3
x2-6x+5x2-25
x2-7x+12x2-9x+20
x3-y3x2-xy+y2x2-y2x3+y3
a2-b2-2bc-c2a2+2ab+b2-c2
x2xy, y2yx, z2zx
x-yxy, y-zyz, z-xzx
xx-y, yx+y, zxx+y
x+yx-y2, x-yx3+y3, y-zx2-y2
aa3+b3, ba2+ab+b2, ca3-b3
1x2-5x+6, 1x2-7x+12, 1x2-9x+20
a-ba2b2, b-cb2c2, c-ac2a2
x-yx+y, y-zy+z, z-xz+x
a-ba+a+bb
abc+bca+cab
x-yx+y-zy+z-xz
x+yx-y+x-yx+y