$$\quad \frac { 2 } { 11 } + \frac { 5 } { 13 } + \frac { 9 } { 11 } + \frac { 8 } { 13 }$$
$2$
$$\frac{26}{143}+\frac{55}{143}+\frac{9}{11}+\frac{8}{13}$$
$$\frac{26+55}{143}+\frac{9}{11}+\frac{8}{13}$$
$$\frac{81}{143}+\frac{9}{11}+\frac{8}{13}$$
$$\frac{81}{143}+\frac{117}{143}+\frac{8}{13}$$
$$\frac{81+117}{143}+\frac{8}{13}$$
$$\frac{198}{143}+\frac{8}{13}$$
$$\frac{18}{13}+\frac{8}{13}$$
$$\frac{18+8}{13}$$
$$\frac{26}{13}$$
$$2$$
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