diff --git a/course/.mapping.json b/course/.mapping.json
index 7e31f5a..0d42eaf 100755
--- a/course/.mapping.json
+++ b/course/.mapping.json
@@ -1 +1 @@
-{"source/main.ptx": ["frontmatter", "course-documents", "ch-notes", "quizzes", "exams", "recitations", "review", "fun"], "source/syllabus/syllabus.ptx": ["syllabus"], "source/notes/1-13.ptx": ["notes-01-13"], "source/notes/1-15.ptx": ["notes-01-15"], "source/notes/1-20.ptx": ["notes-01-20"], "source/notes/1-22.ptx": ["notes-01-22"], "source/notes/1-27.ptx": ["notes-01-27"], "source/notes/1-29.ptx": ["notes-01-29"], "source/notes/2-3.ptx": ["notes-02-03"], "source/notes/2-5.ptx": ["notes-02-05"], "source/notes/2-10.ptx": ["notes-02-10"], "source/notes/2-19.ptx": ["notes-02-19"], "source/notes/2-24.ptx": ["notes-02-24"], "source/quizzes/quiz-01.ptx": ["quiz-01"], "source/quizzes/quiz-02.ptx": ["quiz-02"], "source/quizzes/quiz-03.ptx": ["quiz-03"], "source/quizzes/quiz-04.ptx": ["quiz-04"], "source/exams/exam-01.ptx": ["exam-01"], "source/recitations/calculus-review.ptx": ["recitation-calculus-review"], "source/review/Exam-1-Review.ptx": ["Exam-1-Review"], "source/fun/boxes.ptx": ["boxes"]}
\ No newline at end of file
+{"source/main.ptx": ["frontmatter", "course-documents", "ch-notes", "quizzes", "exams", "recitations", "review", "fun"], "source/syllabus/syllabus.ptx": ["syllabus"], "source/notes/1-13.ptx": ["notes-01-13"], "source/notes/1-15.ptx": ["notes-01-15"], "source/notes/1-20.ptx": ["notes-01-20"], "source/notes/1-22.ptx": ["notes-01-22"], "source/notes/1-27.ptx": ["notes-01-27"], "source/notes/1-29.ptx": ["notes-01-29"], "source/notes/2-3.ptx": ["notes-02-03"], "source/notes/2-5.ptx": ["notes-02-05"], "source/notes/2-10.ptx": ["notes-02-10"], "source/notes/2-19.ptx": ["notes-02-19"], "source/notes/2-24.ptx": ["notes-02-24"], "source/quizzes/quiz-01.ptx": ["quiz-01"], "source/quizzes/quiz-02.ptx": ["quiz-02"], "source/quizzes/quiz-03.ptx": ["quiz-03"], "source/quizzes/quiz-04.ptx": ["quiz-04"], "source/exams/exam-01.ptx": ["exam-01"], "source/recitations/calculus-review.ptx": ["recitation-calculus-review"], "source/review/Exam-1-Review.ptx": ["Exam-1-Review"], "source/review/Exam-2-Review.ptx": ["Exam-2-Review"], "source/fun/boxes.ptx": ["boxes"]}
\ No newline at end of file
diff --git a/course/Exam-1-Review.html b/course/Exam-1-Review.html
index 4452830..0d1f5f8 100755
--- a/course/Exam-1-Review.html
+++ b/course/Exam-1-Review.html
@@ -101,14 +101,14 @@ eBookConfig.allow_pairs = false;
eBookConfig.enableScratchAC = false;
eBookConfig.build_info = "";
eBookConfig.python3 = null;
-eBookConfig.runestone_version = '7.11.19';
+eBookConfig.runestone_version = '7.12.2';
eBookConfig.jobehost = '';
eBookConfig.proxyuri_runs = '';
eBookConfig.proxyuri_files = '';
eBookConfig.enable_chatcodes = false;
-
+
@@ -135,7 +135,7 @@ eBookConfig.enable_chatcodes = false;
-PrevUpNext
+PrevUpNext
\(\newcommand{\N}{\mathbb N}
\newcommand{\Z}{\mathbb Z}
\newcommand{\Q}{\mathbb Q}
@@ -264,13 +264,22 @@ eBookConfig.enable_chatcodes = false;
-
@@ -1017,7 +1026,7 @@ A\cap B \amp = \{HHH, HHT\}