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10.6942*x+x/6-(101.3323*y)+0.0134;1199.641*y-101.3323*x-0.0435
4.213;3.03
y = 4*x-4*x^2+15;-4;4;15
-((4^2-(-4*4*15))/(-4*4))
-(4/(-4*2))
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