(b+3)^2 25b^2+10b+1 (2a-3b)(3b+2a) b^2 - 4/9 1+b^3 (10-c)^2 81a^2-18ab+b^2

(b+3)^2=в^2+9+6в
25b^2+10b+1=(5в+1)^2
(2a-3b)(3b+2a)=4а^2-9в^2
b^2 - 4/9 =(в-2/3)(в+2/3)
1+b^3=1+3в+3в^2+в^3
(10-c)^2=100+с^2-200с
81a^2-18ab+b^2=(9а-в)