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> plot(`+`(`/`(`*`(`+`(`*`(`^`(x, 2)), `-`(x), `-`(6))), `*`(`+`(x, `-`(1)))), `/`(`*`(`+`(`*`(`^`(x, 2)), `-`(`*`(4, `*`(x))), 3)), `*`(`+`(x, 2)))), x = -4 .. 5, y = -20 .. 20, filled = true, color = ...
 

> restart; 1; with(RealDomain); -1; solve(`<=`(`+`(`*`(`+`(RealDomain:-`^`(x, 2), `-`(x), `-`(6)), `*`(RealDomain:-`^`(`+`(x, `-`(1)), -1))), `*`(`+`(RealDomain:-`^`(x, 2), `-`(`*`(4, `*`(x))), 3), `*`(...
 

RealRange(`+`(`-`(infinity)), Open(-2)), RealRange(Open(1), 3) (5.2.1)