The first one has something to do with natural logs, I have no idea what the second one is, and the last one is the quadratic formula. All of these are building blocks in Calculus. Seriously, when I'm in that class I feel like I have downs syndrome compared to the rest of the class...
The third one is summation. You plug in the listed number for x in the equation, then move up to the next number, up and up until you get to the other number it tells you to do, and you add together all the answers you got to get one number.
The third one's the quadratic equasion, used to figure out the value/(s) of x when the unit, the linear section and the squared section are typed into their own places (a, b and c)
LNx=y = e^y=x
so yes, but more specifically with an integral (the big s like line) which is the are between two regions
the huge e like symbol of second one is a sumation of order series
yes
>Be in grade 8
>At pool with friends
>Bitch comes over saying "are you guys gay? cuz you're not talking to any girls"
>Makes fun of us for being young
>Ask her how old she is
>Says she's in college
>I ask her the year she was born
>Long pause
>Mfw