1. expand (x2+5)(x2−2x+1)
2. expand (4−2x2)(x2+4x−1)
3. expand (2x2−2)(3x2−6x−2)
4. expand (x2+3)(x2−2x+3)
5. expand (7−3x2)(x2+3x−5)
6. expand (6−9x2)(x2+8x−2)
7. expand (5x2−3)(6x2−5x−5)
8. expand (x2+4)(x2−5x+10)
9. expand (x2+9)(x2−7x+1)
10. expand (6−4x2)(x2+5x−2)