\(\left\{\left[65-\left(2^3.9+3^2.8\right):12\right]+47\right\}.5^2+500\)
\(=\left\{\left[65-\left(8.9+9.8\right):12\right]+47\right\}.5^2+500\)
\(=\left\{\left[65-2.9.8:12\right]+47\right\}.5^2+500\)
\(=\left\{\left[65-12\right]+47\right\}.5^2+500\)
\(=\left\{53+47\right\}.5^2+500\)
\(=100.25+500=2500+500=3000\)