Calculation: eIuTJr - 1
s^2 =
x1^2+p1+ x2^2+p2+ x3^2+p3+ x_v^2
x1^2+p1+ x2^2+p2+ x3^2+p3+ x_v^2
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s^2 = x1^2+p1+ x2^2+p2+ x3^2+p3+ x_v^2$$s^{2}$$ = $$x1^{2}+p1+x2^{2}+p2+x3^{2}+p3+x_{v}^{2}$$
s = saknis( x1^2+p1+ x2^2+p2+ x3^2+p3+ x_v^2)$$s$$ = $$\sqrt {x1^{2}+p1+x2^{2}+p2+x3^{2}+p3+x_{v}^{2}}$$
x1^2+p1+ x2^2+p2+ x3^2+p3+ x_v^2)$$s$$ = $$\sqrt {x1^{2}+p1+x2^{2}+p2+x3^{2}+p3+x_{v}^{2}}$$