Expression 5: "t" Subscript, 4 , Baseline left parenthesis, "a" , right parenthesis equals 2 "L" left parenthesis, 2 "d" Subscript, "x" , Baseline minus "R" sin left parenthesis, "a" , right parenthesis , "d" minus "R" cos left parenthesis, "a" , right parenthesis , right parenthesis left brace, abs left parenthesis, "a" , right parenthesis less than or equal to StartFraction, pi Over 2 , EndFraction , right bracet4a=2L2dx−Rsina,d−Rcosaabsa≤π2
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Expression 6: "R" equals 1R=1
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Expression 7: "d" equals 2d=2
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Expression 8: "d" Subscript, "x" , Baseline equals 1dx=1
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Expression 9: "L" left parenthesis, "x" , "y" , right parenthesis equals StartRoot, "x" squared plus "y" squared , EndRootLx,y=x2+y2