$$\frac{9}{7}\times\frac{9}{8}+\frac{4}{5}-(-\frac{9}{3}\div\frac{3}{5})$$
$\frac{2029}{280}\approx 7.246428571$
$$\frac{9\times 9}{7\times 8}+\frac{4}{5}-\frac{-\frac{9}{3}}{\frac{3}{5}}$$
$$\frac{81}{56}+\frac{4}{5}-\frac{-\frac{9}{3}}{\frac{3}{5}}$$
$$\frac{405}{280}+\frac{224}{280}-\frac{-\frac{9}{3}}{\frac{3}{5}}$$
$$\frac{405+224}{280}-\frac{-\frac{9}{3}}{\frac{3}{5}}$$
$$\frac{629}{280}-\frac{-\frac{9}{3}}{\frac{3}{5}}$$
$$\frac{629}{280}-\frac{-3}{\frac{3}{5}}$$
$$\frac{629}{280}-\left(-3\times \frac{5}{3}\right)$$
$$\frac{629}{280}-\left(-5\right)$$
$$\frac{629}{280}+5$$
$$\frac{629}{280}+\frac{1400}{280}$$
$$\frac{629+1400}{280}$$
$$\frac{2029}{280}$$
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$\frac{2029}{2 ^ {3} \cdot 5 \cdot 7} = 7\frac{69}{280} = 7.246428571428571$
