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Divide:
 
(i) \((32y^2 - 8yz)\) by \(2y\) \(=\)
 
(ii) \((4m^2n^3 + 16m^4n^2 - mn)\) by \(2mn =\)
 
(iii) \(5xy^2 - 18x^2y^3 + 6xy\) by \(6xy =\)
 
(iv) \(81(p^4q^2r^3 + 2p^3q^3r^2 - 5p^2q^2r^2)\) by \((3pqr)^2 =\)
Answer variants:
\(\frac{5}{6}y + 3xy^2 + 1\)
\(\frac{5}{6}y - 3xy^2 + 1\)
\(2mn^2 - 8m^3n - \frac{1}{2}\)
\(9p^2r + 18pq - 45\)
\(9p^2r - 18pq - 45\)
\(16y + 4z\)
\(16y - 4z\)
\(2mn^2 + 8m^3n - \frac{1}{2}\)