Find the sum of the following expressions: \[ 5 x^{3}-x^{2}+x-1 ; 2 x^{2}-2 x+5 ;-5 x^{3}+5 x-4 \]

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Find the sum of the following expressions:
\[
5 x^{3}-x^{2}+x-1 ; 2 x^{2}-2 x+5 ;-5 x^{3}+5 x-4
\]
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