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{SECT 0 {EXCHG {PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT 
-1 39 "  second-order ODE:  y'' - y' + y = t^2" }}{PARA 0 "" 0 "" 
{TEXT -1 0 "" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "
" {TEXT -1 32 "clear workspace & load ODE stuff" }}}{EXCHG {PARA 0 "> \+
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1 0 14 "with(DEtools):" }{TEXT -1 0 "" }}}{EXCHG {PARA 0 "" 0 "" 
{TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT -1 16 "general solution" }}}
{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 65 "gsol := dsolve([diff(y(t),t,
t) -diff(y(t),t) + y(t) = t^2],y(t));" }}}{EXCHG {PARA 0 "" 0 "" 
{TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT -1 5 "voila" }}}}{MARK "7" 0 }
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