diff --git a/back-cover.typ b/back-cover.typ
new file mode 100644
index 0000000..255b38b
--- /dev/null
+++ b/back-cover.typ
@@ -0,0 +1,10 @@
+#import "color.typ": text_color_set
+
+#{
+
+set align(right)
+v(1fr)
+set text(22pt, fill: text_color_set.at("100"))
+box($ F_n = 1/(sqrt(5))[((1+sqrt(5))/2)^n-((1-sqrt(5))/2)^n] $)
+
+}
\ No newline at end of file
diff --git a/main.typ b/main.typ
index 0eaf0db..84b2485 100644
--- a/main.typ
+++ b/main.typ
@@ -55,11 +55,8 @@
 )
 ]
 
-#[
-#show: setup_main_text
-
 #{
-
+show: setup_main_text
 for i in range(0, toc.len()) {
 	pagebreak(weak: true)
 	let chapter = toc.at(i)
@@ -73,7 +70,11 @@ for i in range(0, toc.len()) {
 		include "sections/" + n + ".typ"
 	}
 }
+} // main text
 
-}
+#{
 
-]
\ No newline at end of file
+pagebreak(weak: true, to: "even")
+include "back-cover.typ"
+
+} // back cover
\ No newline at end of file