my teacher was in a rush at the end of the class and he literally only spent 5 minutes on summations, so i'm kinda confused here.

Evaluate:

10

Σi(i^2+1)

i=1

Evaluate:

10

Σk(k- 2)(k+2)

k=1

oh and also if you can, i think i got it right, but i always make some dumb mistakes on these long ones

find the derivative y = (2x^7 - x^2)(x - 1/x + 1)

just the answer would be enough for this last one, if it doesn't match then i'll check my math again.

Love ya guys!