Engineer's favourite Equation

[wyz135]

In TF2, I heard the engineer has a favourite equation, any ideas what it meant (such a complicated equation which I have never seen in my Maths book):

[axesupra]

i go to WVU, and have successfully finished calculus 1 with an A.
That E and i, and n=1, that represents what is called the Riemann Sum, and with that you calculate the area under a curve. I interpreted as an Integral, because it is easier for me, the rest is multi-variable, which could be anything. "v" is perhaps velocity, thats what i had in physics classes. Bottom line, it has something to do with a curve, and an area under it.
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[wyz135]

Calculus.....sounds cool..... what is the topic studied in it?? I know one of them is Infinite Series

[axesupra]

at WVU calculus 1 covers things such as, limits, differentiation, trig differentiation, trig inverse differentiation, inverse functions, logarithmic diffentiation, laws of logarithms, riemann sum, anti-derivatives, integrals, optimizations problems, related rate problems, limits with relation to L' Hospitals Rule, all the good stuff u need.
im taking calculus 2 next semester, and that will discuss more about integrals.
Integrals r most important in calculus
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[-RK]

Translate it to get rid of the symbols. Until I understand what the symbols represent I can't figure it out.