t/3=(3-t^2)^(.5)/((t+3)^2+(3-t^2))^(.5)
t^2/9=(3-t^2)/((t+3)^2+3-t^2),...7t^2+2t^3=9...
t/3=(3-t^2)^(.5)/((t+3)^2+(3-t^2))^(.5)
t^2/9=(3-t^2)/((t+3)^2+3-t^2),...7t^2+2t^3=9...
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