(7x-3) (2x+1) -14x
-5/2*4
9x(3x-18)=36
-3 + 9 -5
-5/2
-5/2 4
(-3/2)3
34/53
20w3+10w3+7w3+4w3–41w3
find a solution to x^2 = 17 mod 128
