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Answer:
1 - 22
2 -
[tex] - 4x {y}^{3} - 6 {x}^{4} {y}^{3} + 7 {y}^{4} - 8 {x}^{4} {y}^{4} [/tex]
3- ( x = -4)
4 - Irrational numbers
[tex] \sqrt{53} \: \: \: \: \: \sqrt{19} \: \: \: \: \pi[/tex]
integers
[tex]0 \: \: \: \: \: \frac{ - 12}{6} [/tex]
rational
[tex] \frac{2}{3} \: \: \: \: \frac{6}{45} [/tex]
natural numbers 8