$$\frac{11}{4}+3\frac{1}{2}+3\frac{1}{4}+6\frac{1}{2}$$
$16$
$$\frac{11}{4}+\frac{6+1}{2}+\frac{3\times 4+1}{4}+\frac{6\times 2+1}{2}$$
$$\frac{11}{4}+\frac{7}{2}+\frac{3\times 4+1}{4}+\frac{6\times 2+1}{2}$$
$$\frac{11}{4}+\frac{14}{4}+\frac{3\times 4+1}{4}+\frac{6\times 2+1}{2}$$
$$\frac{11+14}{4}+\frac{3\times 4+1}{4}+\frac{6\times 2+1}{2}$$
$$\frac{25}{4}+\frac{3\times 4+1}{4}+\frac{6\times 2+1}{2}$$
$$\frac{25}{4}+\frac{12+1}{4}+\frac{6\times 2+1}{2}$$
$$\frac{25}{4}+\frac{13}{4}+\frac{6\times 2+1}{2}$$
$$\frac{25+13}{4}+\frac{6\times 2+1}{2}$$
$$\frac{38}{4}+\frac{6\times 2+1}{2}$$
$$\frac{19}{2}+\frac{6\times 2+1}{2}$$
$$\frac{19}{2}+\frac{12+1}{2}$$
$$\frac{19}{2}+\frac{13}{2}$$
$$\frac{19+13}{2}$$
$$\frac{32}{2}$$
$$16$$
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$2^{4}$
