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x=1.45535*2,t=2*((0.640817*sin(3*PI/180) 5/7) 1)/(7 0.5 9.8)*x,0.06 x*t-1/2*0.5*9.8*t^2 1/2×((5/7 x-2/7 (5/7 0.640817 (x sin(3*PI/180))))^2/0.065)/9.8
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