Tidy up math blocks

2023/notes.md

@@ -211,12 +211,17 @@ return math.prod(
 
 Note the inequality:
 
-```
-(time - i) * i > distance
--1 * x * x + time * x - distance > 0
-# Quadratic equation!
-x = (-b +/- sqrt(b**2 - 4 * a * c)) / (2 * a)
-x = (-time +/- math.sqrt(time**2 - 4 * distance)) / (-2)
+```math
+(time - i) * i > distance\\
+
+-1 * x * x + time * x - distance > 0\\
+
+\text{Quadratic equation!}\\
+
+x = (-b +/- sqrt(b**2 - 4 * a * c)) / (2 * a)\\
+
+x = (-time +/- math.sqrt(time**2 - 4 * distance)) / (-2)\\
+
 x = (time +/- math.sqrt(time**2 - 4 * distance)) / 2
 ```
 
@@ -417,9 +422,9 @@ If the rocks finish in the same location after $cycle_a$ and $cycle_b$ rotations
 To compute the finish pattern after a large number of cycles, $number$,
 
 ```math
-cycle_len = cycle_b - cycle_a
-remainder = (number - cycle_a) % cycle_len
-cycle_number = cycle_(a + remainder)
+cycle_{len} = cycle_b - cycle_a \\
+remainder = (number - cycle_a) % cycle_len \\
+cycle_number = cycle_{a + remainder}
 ```
 
 ## Notes