Dear TypeRighter:<br /><br />I received the last documents, thank you a lot and it looks great. The only changes is the "using differential equations" to "and their differential equations..." as I intended to say that thoese three items are "equal" or in parallel. Here I am submitting a new one. Sorry that I couldn't submit with 2-hr editing to pay you more as expected as I am needing them asap today, but I would appreciate again your help at your best convenience time as you could. I past their deadline less than few days but anyway just go ahead and supopose it is not so strict. I will get some long-articles later to edit for other schools as required but they have deadlines since Mid Dec to January with less hurry.<br /><br />Best,<br /><br />Qinwu