1. $2(x+3)-(x+2)^2=$

2. $(2x-4)(2x+4)=$

3. $\dfrac{3^5}{3^3}=$

4. $4^{-3}=$

5. $2^5\times 2^4=$

6. $\sqrt{50}=$

7. $2^4\times 4^5=$

8. $(3x+4)^2=$

9. $(\sqrt{2}x+1)^2=$

10. $(2x+1)(3x+5)=$