\[\boxed{\text{487\ (487).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\textbf{а)}\ y \leq x^{2} - 4\]
\(\ \)
\[\textbf{б)}\ y \geq (x - 2)^{2} - 1\]
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\[\textbf{в)}\ x^{2} + y^{2} \leq 25\]
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\[\textbf{г)}\ (x - 1)^{2} + (y - 2)^{2} \leq 4\]
\(\ \)