1) $rac{x^2}{32} - rac{x}{16}$

2) $2(x-4) > 4x$

3) $12a^8b^4 - 18a^4b^3 =

4) $(x-4)(x+d) =

5) $24x^2 - rac{1}{2}y^2 =

6) $(4xy + 2a)(4xy - 2a) =

7) $14a^2b + 14ba + x^2b =

8) $(a^2 - 2a + 4)(a^2 + a - d) =

9) $(4ab - 2x)^2 =

10) $(4x - 4)(x^2 + x - 2) =