I think I did this well but I'd like them checked so I know I have the right answers. Could you please look at these for me?

1] $\displaystyle (1 + 2x)^6$

= $\displaystyle 1 + 12x + 60x^2 + 160x^3 + 240x^4 + 96x^5 + 64x^6$

2] $\displaystyle (3 + 2x)^5$

= $\displaystyle 243 + 810x + 1080x^2 + 730x^3 + 240x^4 + 32x^5$

3] $\displaystyle (5 + 3x)^3$

= $\displaystyle 125 + 225x + 135x^2 + 27x^3$

4] $\displaystyle (4 - 2x)^4$

= $\displaystyle 256 - 512x + 384x^2 - 108x^3 + 16x^4$

Thanks if you can help with this!