\[\boxed{\text{312\ (312).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ \left( 5x^{2} - 3 \right) - (2x + 5) = 5x^{2}\]
\[- 2x = 8\]
\[x = - 4.\]
\[Ответ:\ x = - 4.\]
\[2)\ x^{2} - (x + 1) - \left( x^{2} - 7x + 32 \right) =\]
\[= 3\]
\[6x = 36\]
\[x = 6.\]
\[Ответ:x = 6.\]
\[- 15 = - 15\]
\[Ответ:y - любое\ число.\ \]