\[\boxed{\text{52.\ }\text{ОК\ ГДЗ\ -\ домашка\ на\ 5}}\]
\[\textbf{а)}\ 6a(a + 1) <\]
\[< (3a + 1)(2a + 1) + a\]
\[6a^{2} + 6a <\]
\[< 6a^{2} + 3a + 2a + 1 + a\]
\[6a^{2} + 6a - 6a^{2} - 6a < 1\]
\[0 < 1 \Longrightarrow ч.т.д.\]
\[4p^{2} + 2p - 2p - 1 + 3p + 3 >\]
\[> 4p^{2} + 3p\]
\[4p^{2} + 3p - 4p^{2} - 3p > 1 - 3\]
\[0 > - 2\ \ \ | \cdot ( - 1)\]
\[2 > 0 \Longrightarrow ч.т.д.\]