$3y''-2y'-8y=0$
$\int ( 3 x ^ { 2 } + 2 ) ^ { 4 } ( x ) d x$
$y'\:=\:-y\:-\:2x$
$4a^2+12a+9$
$\int4xsin\left(2x+9\right)dx$
$-x+\frac{2}{3}\ge x+1$
$\frac{a\left(f-t\right)}{a\left(f+y\right)}$
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