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((((75/100)*x^2)/3)*x^144)/100 = x // - x
((((75/100)*x^2)/3)*x^144)/100-x = 0
1/400*x^146-x = 0
x*(1/400*x^145-1) = 0
1/400*x^145 = 1 // : 1/400
x^145 = 400
x^145 = 400 // ^ 1/145
x = 400^(1/145)
x = 0
x = 0
x in { 400^(1/145), 0 }
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