Math Olympiad | A Nice Exponential Problem | 80% Failed to solve!

[@yakupbuyankara5903]

X=(4,6)

[@RealQinnMalloryu4]

(x^5➖ 20)+(x^3➖ 196)+(x^2➖ 49)={15+193+47}=255 10^20^55 10^20^5^11 10^2^10^5^11^1 2^5^2^2^5^5^1^1 1^1^1^2^1^1 21(x ➖ 2x+1).