Comment: lol...

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In reply to comment: ooooohhh that's why i don't (see in situ)

lol...

Touche.

But hey man, algebra can be quite tough and is quite an extensive field. Linear algebra is one of the most complex subjects in mathematics.

And I've found from my studies and asking my math and physics professors that most of the mistakes made when doing calculus (or most any other) calculations are algebra mistakes.