CALLING ALL NERDS!

Janet, Suzy, you have been sent into the Nerd Off. Into today’s challenge, you will race to complete a series of 11 math problems, ranging in difficulty. The answer to every problem will be between 1 and 26. If the problem’s answer is 1, that equation represents the letter A. If the answer to the problem is 2, that problem represents letter B, and so on. There will be two screenshots. The equations from each screenshot will give you letters that form a word (so there are two words total). These words are the first and last names of a famous mathematician. The first person to send me the name of this famous figure wins the Nerd Off and lives to fight another day! (also there is a chance that some of these equations have mistakes, so you are allowed to check with me as you do each one).

Any questions?

example btw

2+2=4
problem would represent D

3x3=9
problem represents I

4+1=5
problem represents E

This group forms the word DIE