200,40,8,1.6,0.42
x + 3 over x² - 9 PLUS x + 3 over x² - 9
((12^2+5^2)^.5)^3
((12^2+5^2)^1/2)^3
10:5,3:2
3+2+9
π/4 ⋅d^(2)= 1/4
5x x 3y
