I. Perform the following operation.(2pts each) 2x X 1. + x-1 x-1 + 4x+1 2x-8 2. x +6 X+6 3. y2-y-2 . 107 5y y+1 a-4 1 4. a2-2a-8 a-5 5. 6a+27 16a+72 + 18a2+36a 2a+4​