\(C=2x^5-5y^3+2015\)
\(\left|x-1\right|+\left(y+20\right)^{20}=0\)
\(\Leftrightarrow\left\{{}\begin{matrix}x-1=0\\y+2=0\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}x=1\\y=-2\end{matrix}\right.\) thay vào \(C\) ta được
\(C=2.1^5-5.\left(-2\right)^3+2015\)
\(C=2+40+2015\)
\(C=2057\)