Refactor handout.typ

Reviewed-on: #7
Co-authored-by: Mark <mark@betalupi.com>
Co-committed-by: Mark <mark@betalupi.com>

src/Advanced/Tropical Polynomials/main.typ

@@ -1,13 +1,6 @@
 #import "@local/handout:0.1.0": *
 
-#show: doc => handout(
-  doc,
-  group: "Advanced 2",
-  quarter: link(
-    "https://betalupi.com/handouts",
-    "betalupi.com/handouts",
-  ),
-
+#show: handout.with(
   title: [Tropical Polynomials],
   by: "Mark",
   subtitle: "Based on a handout by Bryant Mathews",

src/Advanced/Tropical Polynomials/parts/02 cubic.typ

@@ -153,7 +153,7 @@ What are the roots of the following polynomial?
 #v(1fr)
 #pagebreak() // MARK: page
 
-#problem()
+#problem(label: "findci")
 If
 $
   f(x) = c_0 #tp c_1 x #tp c_2 x^2 #tp ... #tp c_n x^n
@@ -183,7 +183,7 @@ Find a formula for each $C_i$ in terms of $c_0, c_1, ..., c_n$.
 
 
 #problem()
-With the same setup as the previous problem, \
+With the same setup as @findci, \
 find formulas for the roots $r_1, r_2, ..., r_n$.
 
 #solution([