Expression 8: StartFraction, left parenthesis, "x" cos left parenthesis, "a" , right parenthesis minus "y" sin left parenthesis, "a" , right parenthesis plus 7 , right parenthesis squared Over 24 , EndFraction plus StartFraction, left parenthesis, "x" sin left parenthesis, "a" , right parenthesis plus "y" cos left parenthesis, "a" , right parenthesis , right parenthesis squared Over 6 , EndFraction equals 1xcosa−ysina+7224+xsina+ycosa26=1
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Expression 9: StartFraction, left parenthesis, "x" cos left parenthesis, "a" , right parenthesis minus "y" sin left parenthesis, "a" , right parenthesis , right parenthesis squared Over 6 , EndFraction plus StartFraction, left parenthesis, "x" sin left parenthesis, "a" , right parenthesis plus "y" cos left parenthesis, "a" , right parenthesis plus 7 , right parenthesis squared Over 24 , EndFraction equals 1xcosa−ysina26+xsina+ycosa+7224=1
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Expression 10: StartFraction, left parenthesis, "x" cos left parenthesis, "a" , right parenthesis minus "y" sin left parenthesis, "a" , right parenthesis , right parenthesis squared Over 6 , EndFraction plus StartFraction, left parenthesis, "x" sin left parenthesis, "a" , right parenthesis plus "y" cos left parenthesis, "a" , right parenthesis minus 7 , right parenthesis squared Over 24 , EndFraction equals 1xcosa−ysina26+xsina+ycosa−7224=1
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Expression 11: "y" equals .1 left parenthesis, "x" plus 1 , right parenthesis squared minus 30 left brace, negative .2 5 less than "x" , right brace left brace, negative 30 less than "y" less than negative 19 , right bracey=.1x+12−30−.25<x−30<y<−19
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Expression 12: left parenthesis, "x" plus 2.4 , right parenthesis equals .0 0 3 left parenthesis, "y" plus 7 , right parenthesis squared left brace, negative 30 less than "y" less than negative 6.5 , right bracex+2.4=.003y+72−30<y<−6.5
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Expression 13: "y" equals negative .1 left parenthesis, "x" minus 10 , right parenthesis squared minus 19 left brace, negative 30 less than "y" , right brace left brace, "x" less than 9.5 , right bracey=−.1x−102−19−30<yx<9.5