If those are numbers (to multiply with the variable), then here's the answer
10(5) + 1x + 2x + 3x + 4x + 5x = 10(5) +15x = 50 + 15x
If those are exponents, then here's the answer..
[tex]10(5) +( x^1+x^2+x^3+x^4+x^5)=50+x^1+x^2+x^3+x^4+x^5[/tex]
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I hope that you'll mark my answer as brainliest answer if I helped you with your assignment. :)