x(x-1)/2=28

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Solution for x(x-1)/2=28 equation: 


(x/3)*x-(18*x^2)-((6*x)/6) = 0

10*sin(377*x)

(1/5)*w-(3/2) = -2/3

x^2-y^2 = -6/16

(1/95)*b = 27170/10145

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