$$if^{\prime}a=3;; b=2$$
$c=\frac{11}{72}\approx 0.152777778$
$$c=-2\times 3^{-2}+3\times 2^{-3}$$
$$c=-2\times \frac{1}{9}+3\times 2^{-3}$$
$$c=-\frac{2}{9}+3\times 2^{-3}$$
$$c=-\frac{2}{9}+3\times \frac{1}{8}$$
$$c=-\frac{2}{9}+\frac{3}{8}$$
$$c=\frac{11}{72}$$
$$a=3$$ $$b=2$$ $$c=\frac{11}{72}$$
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