Let u(x) and v(x) be differentiable functions such that
\displaystyle\frac{{{u}{\left({x}\right)}}}{{{v}{\left({x}\right)}}}={7}.{\quad\text{if}\quad}\frac{{{u}'{\left({x}\right)}}}{{{v}'{\left({x}\right)}}}={p}{\quad\text{and}\quad}{\left(\frac{{{u}{\left({x}\right)}}}{{{v}{\left({x}\right)}}}\right)}'={q},\ \text{ then }\ \frac{{{p}+{q}}}{{{p}-{q}}} has the value equal to

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