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$${c x {\left(f\left(s\right) - 1\right)} a\left(s\right) D[1]\left(U\right)\left(e, s\right) + {\left(c U\left(e, s\right) - p\right)} x {\left(f\left(s\right) - 1\right)} D[0]\left(a\right)\left(s\right) + {\left(c U\left(e, s\right) - p\right)} x a\left(s\right) D[0]\left(f\right)\left(s\right) - D[0]\left({\rm CF}\right)\left(s\right)}$$
cx(f(s)−1)a(s)D[1](U)(e,s)+(cU(e,s)−p)x(f(s)−1)D[0](a)(s)+(cU(e,s)−p)xa(s)D[0](f)(s)−D[0](CF)(s){c x {\left(f\left(s\right) - 1\right)} a\left(s\right) D[1]\left(U\right)\left(e, s\right) + {\left(c U\left(e, s\right) - p\right)} x {\left(f\left(s\right) - 1\right)} D[0]\left(a\right)\left(s\right) + {\left(c U\left(e, s\right) - p\right)} x a\left(s\right) D[0]\left(f\right)\left(s\right) - D[0]\left({\rm CF}\right)\left(s\right)}