Expression 4: "d" Subscript, "o" "t" 2 , Baseline left parenthesis, left parenthesis, "x" , "y" , right parenthesis minus left parenthesis, negative 1 , 0 , right parenthesis , right parenthesis equals 2 squareddot2x,y−−1,0=22
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Expression 5: "d" Subscript, "o" "t" 2 , Baseline left parenthesis, left parenthesis, "x" , "y" , right parenthesis minus left parenthesis, 1 minus StartRoot, 2 , EndRoot , 0 , right parenthesis , right parenthesis equals 2dot2x,y−1−2,0=2
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Expression 6: left parenthesis, 1 , 0 , right parenthesis1,0
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Expression 7: negative 1 less than "x" less than 1−1<x<1