added a program, some testing documents and math homework

schule/mathe/tests/pinnit.typ

@@ -0,0 +1,87 @@
+// Example adapted from: @Matt https://discord.com/channels/1054443721975922748/1088371919725793360/1166508915572351067
+
+#import "@preview/pinit:0.2.2": *
+#set page(width: 700pt, height: auto, margin: 30pt)
+#set text(size: 20pt)
+#set math.equation(numbering: "(1)")
+
+#let pinit-highlight-equation-from(
+  height: 2em,
+  pos: bottom,
+  fill: rgb(0, 180, 255),
+  highlight-pins,
+  point-pin,
+  body,
+) = {
+  pinit-highlight(
+    ..highlight-pins,
+    dy: -0.9em,
+    fill: rgb(..fill.components().slice(0, -1), 40),
+  )
+  pinit-point-from(
+    fill: fill,
+    pin-dx: 0em,
+    pin-dy: if pos == bottom {
+      0.5em
+    } else {
+      -0.9em
+    },
+    body-dx: 0pt,
+    body-dy: if pos == bottom {
+      -1.7em
+    } else {
+      -1.6em
+    },
+    offset-dx: 0em,
+    offset-dy: if pos == bottom {
+      0.8em + height
+    } else {
+      -0.6em - height
+    },
+    point-pin,
+    rect(
+      inset: 0.5em,
+      stroke: (bottom: 0.12em + fill),
+      {
+        set text(fill: fill)
+        body
+      },
+    ),
+  )
+}
+
+Equation written out directly (for comparison):
+
+$ (q_T^* p_T) / p_E p_E^* >= (c + q_T^* p_T^*)(1+r^*)^(2N) $
+
+Laid out with pinit:
+
+#v(3.5em)
+
+$
+  (#pin(1)q_T^* p_T#pin(2))/(#pin(3)p_E#pin(4))#pin(5)p_E^*#pin(6) >= (c + q_T^* p_T^*)(1+r^*)^(2N)
+$
+
+#v(5em)
+
+#pinit-highlight-equation-from(
+  (1, 2, 3, 4),
+  (3, 4),
+  height: 3.5em,
+  pos: bottom,
+  fill: rgb(0, 180, 255),
+)[
+  quantity of Terran goods
+]
+
+#pinit-highlight-equation-from(
+  (5, 6),
+  (5, 6),
+  height: 2.5em,
+  pos: top,
+  fill: rgb(150, 90, 170),
+)[
+  price of Terran goods, on Trantor
+]
+
+Paragraph after the equation.