Some math books are set up as a cook book really. You have your ingrediants and you follow your steps and you are left with the end result.

Take my modeling class for instance.

**How to Approximate a Non-Dimensionalized Ordinary Differential Equation**
__Ingrediants__:

10-13 Pieces of Lined Paper

1 Scrap Notebook

1 Mechanical Pencil

1 Great Eraser

5-6 Wikipedia Pages

10-20 Different Properties and Trig Identities

__Step 1__: Brace yourself

__Step 2__: Get your scrap notebook, pencil, and eraser ready

__Step 3__: Look up all variables and units of variables. Wikipedia Baby! CHECK YOUR UNITS!

__Step 4__: Create non-dimensional parameters from the variables. Think carefully!

__Step 5__: Plug it into your ODE and initial conditions. Alright looking good!

__Step 6__: Approximate solution as a power series and throw that sucker in there. Does that look much better? I didn't think so.

__Step 7__: Time to solve instead of 1 now 3 different ordinary differential equations and also one is not homogeneous so its time to get out those trig identities. Fun.

__Step 8__: Write it all over again on that pretty lined paper! Be Neat!

__End product__: Several hours of your life wasted away as well as the several trees you just killed with the amount of paper used. But a job well done! Congrats. You get a cupcake! -Now interpret you solution. no joke. I'm serious.

Oh the Joys of HW!

-QED