25)10y4-7y3+16y2-23y+4)/(2y3-y2+3y-4)
26)(2t4-7t3+t2+7t-3)/(t2-1)
27)(3x8+7x7+2x6-10x4-5x3+3)/(x3+3x4-1)
28)(x6-8y6)/(x4+2x2y2+4y4)
29)(x4n-2x2ny2n+y4n)/(x2n-2xnyn+y2n)
30)(3x35x2y8xy2-2y3)/(3x+y)
31)(x2y6x312xy2-6y3)/(2x-y)
32)(2x2+3xy02y2-2x+6y-4)/(x+2y-2)
33)(X3-Y3)/(x-y)
34)(x5+y7)/(x+4)
35)(x7+y7)/(x-y)