Best Answer:
! = factorial, hard to explain so i'll give an example.

5! is 5 x 4 x 3 x 2 x 1

8! is 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1

It gets more complicated if you're doing things like series but I'm assuming that if you don't know what it means you aren't interested in that.

^ is just a way to write something that would normally be superscript (like an exponent).

5^3 is five cubed

∑ = the greek letter sigma, which in math means summation, basically you do the sum of all numbers that meet a criterion that you specify.

∑(n=1,n=5) (5n) [I guess thats how you would write it in a computer] would be 5(1) + 5(2) + 5(3) + 5(4) + 5(5)

∏ = the greek letter pi, which in math is basically the same thing as the sigma except it's a product and not a sum.

∫ = integral, hard to explain if you've never taken calculus so accept this simple explination. If you had the equation y = x and you wanted to find the area under the line you would integrate x (it would look like ∫y = ∫xdx, sometimes you see ∫y as Y)

On that note, the opposite of this (which you should learn first actually) is the derivative. If we have y = x^2 than the derivative of this function will tell us what the slope is at any given point. It would look like this, dy/dx = 2x

as for others, there are a lot. A whole lot.

Just ones that I can think of off the top of my head:

epsilon(looks like an E): defines a set of numbers I believe (for every epsilon greater than zero there exists a delta greater than zero. . . [definition of a limit])

limit: the number that a graph converges to as you get arbitrarily close to a point from the left and from the right.

>, < = greater than, less than

log = again hard to explain so here is an example.

5^y = x

y = log(5)x

I was taught to think of it this way, y is the exponent i need to raise by base 5 to to get x as an answer.

ln = same as log except it is base e

e is just a constant like lower case pi.

sin, cos, tan, sec, csc, cot, and all of their inverse and hyperbolic functions = take a trig course.

that should be plenty to get you started.

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