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Recently Referred Formulae

sum_{nneq a} p_nfrac{p_a}{1-p_n}
p_{[a-*]}=p_a+sum_{nneq a} p_n frac{p_a}{1-p_n}
p_{[a-*-*]}=p_a+\sum_{n\neq a} p_n \frac{p_a}{1-p_n}+\sum_{n\neq m,a}\sum_{m\neq a} p_m\frac{p_n}{1-p_m}\frac{p_a}{1-p_m-p_n}
p_{[a-*-*]}=p_a+\sum_{n\neq a} p_n \frac{p_a}{1-p_n}\sum_{n\neq m,a}\sum_{m\neq a} p_m\frac{p_n}{1-p_m}\frac{p_a}{1-p_m-p_n}
p_{[a-*-*]}=\sum_{n\neq m,a}\sum_{m\neq a} p_m\frac{p_n}{1-p_m}\frac{p_a}{1-p_m-p_n}