(4i^+4j^)(4\hat{i}+4\hat{j})(4i^+4j^)
(4i^−4j^+4k^)W(4 \hat{i}-4 \hat{j}+4 \hat{k}) \mathrm{W}(4i^−4j^+4k^)W
6 W6 \ W6 W
8 W8 \ W8 W