m·d_{tt}^{2}[x] = k·pq·( x^{n}/(ct)^{n} )+(-1)·kpq·( d_{t}[x]^{n}/c^{n} )
m·d_{tt}^{2}[x] = k·pq·( x^{n}/(ct)^{n} )+(-1)·kpq·( (d_{t}[x]^{n}·t^{n})/(ct)^{n} )
x(t) = vt
m·d_{tt}^{2}[x] = p·P[E]_{e}(x)+p·P[B]_{e}(x)
d_{tt}[ P[E]_{e}(x)+P[B]_{e}(x) ] = d_{xx}[ P[E]_{e}(x)+P[B]_{e}(x) ]·d_{t}[x]^{2}
d_{tt}[ P[E]_{e}(y)+P[B]_{e}(y) ] = d_{yy}[ P[E]_{e}(y)+P[B]_{e}(y) ]·d_{t}[y]^{2}
d_{tt}[ P[E]_{e}(z)+P[B]_{e}(z) ] = d_{zz}[ P[E]_{e}(z)+P[B]_{e}(z) ]·d_{t}[z]^{2}
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