Simplify:
4
−
3
x
+
7
5
x
x
+
7
−
8
\displaystyle \frac{{{4}-\frac{{3}}{{{x}+{7}}}}}{{\frac{{{5}{x}}}{{{x}+{7}}}-{8}}}
x
+
7
5
x
−
8
4
−
x
+
7
3
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