+14966 500-[(16*18-192:f):7+14*5+10]:4*7+5=299
\(\Large 500-\frac{\frac {16\times 18-\frac{192}{f}}{7}+14 \times5+10}{4} \times7 +5 =299\)
\(\Large206=\frac{\frac {16\times 18-\frac{192}{f}}{7}+14 \times5+10}{4} \times7\)
\(\Large206=\frac{288-\frac{192}{f}+560}{4}\)
\(\Large206=72-\frac{48}{f}+140\)
\(\Large \frac{48}{f}=6\)
\(\Large f=\frac{48}{6}\)
\(\Large f=8\) 
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