Expression 7: StartFraction, "x" squared Over left parenthesis, "R" plus StartNestedFraction, 1 NestedOver "R" , EndNestedFraction , right parenthesis squared , EndFraction plus StartFraction, "y" squared Over left parenthesis, "R" minus StartNestedFraction, 1 NestedOver "R" , EndNestedFraction , right parenthesis squared , EndFraction equals 1x2R+1R2+y2R−1R2=1
7
Expression 8: StartFraction, "x" squared Over left parenthesis, cos left parenthesis, "a" , right parenthesis , right parenthesis squared , EndFraction minus StartFraction, "y" squared Over left parenthesis, sin left parenthesis, "a" , right parenthesis , right parenthesis squared , EndFraction equals 4x2cosa2−y2sina2=4
8
元 left parenthesis, "R" cos left parenthesis, "a" , right parenthesis , "R" sin left parenthesis, "a" , right parenthesis , right parenthesisRcosa,Rsina
像 left parenthesis, left parenthesis, "R" plus StartFraction, 1 Over "R" , EndFraction , right parenthesis cos left parenthesis, "a" , right parenthesis , left parenthesis, "R" minus StartFraction, 1 Over "R" , EndFraction , right parenthesis sin left parenthesis, "a" , right parenthesis , right parenthesisR+1Rcosa,R−1Rsina