Finally, we reach a **complex number** of the nth order.

If such a **complex number** is written (as usual) in the form x i e l +x 2 e 2 +...

Also the "unit" e l (or e,) considered as a number of the system is merely a shortened form for the **complex number** (+I) ei +0e2+ +oen.

Accordingly, the typical form for such a **complex number** is x+yi, and then with this notation the above-mentioned definition of multiplication is invariably adopted.

Chinese food seems simple at first, but it is really made up of a **complex number** of vegetables, meats, sauces, spices, and preserved foods that blend together to form many intricate cuisines.