simplify into sinc formation Xn$=(1/$t$0)($integral from $-\mathrm{.}5$ to $\mathrm{.}5)5$e$^(-$jnw$\_0$t$)$dt $+($integral from $\mathrm{.}5$ to $4\mathrm{.}5)0$e$^(-$jnw$\_0$t$)$dt