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c = x^21*((2*x^22)/7) // - x^21*((2*x^22)/7)
c-(x^21*((2*x^22)/7)) = 0
c+(-2/7)*x^43 = 0
-2/7*x^43 = -c // : -2/7
x^43 = 7/2*c
x^43 = 7/2*c // ^ 1/43
x = (7/2)^(1/43)*c^(1/43)
x = (7/2)^(1/43)*c^(1/43)
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