diff --git a/library/src/math/mod.rs b/library/src/math/mod.rs
index 45e33daf9..cbe636b1b 100644
--- a/library/src/math/mod.rs
+++ b/library/src/math/mod.rs
@@ -53,6 +53,7 @@ pub fn module() -> Module {
     let mut math = Scope::deduplicating();
     math.def_func::<FormulaNode>("formula");
     math.def_func::<LrNode>("lr");
+    math.def_func::<OpNode>("op");
     math.def_func::<FloorFunc>("floor");
     math.def_func::<CeilFunc>("ceil");
     math.def_func::<AbsFunc>("abs");
@@ -75,8 +76,8 @@ pub fn module() -> Module {
     math.def_func::<FrakNode>("frak");
     math.def_func::<MonoNode>("mono");
     math.def_func::<BbNode>("bb");
-    define_spacings(&mut math);
-    define_operators(&mut math);
+    spacing::define(&mut math);
+    op::define(&mut math);
     Module::new("math").with_scope(math)
 }
 
diff --git a/library/src/math/op.rs b/library/src/math/op.rs
index a7d291660..cf1f91058 100644
--- a/library/src/math/op.rs
+++ b/library/src/math/op.rs
@@ -48,42 +48,56 @@ impl LayoutMath for OpNode {
     }
 }
 
-/// Hook up all operators.
-pub(super) fn define_operators(math: &mut Scope) {
-    math.define("arccos", op("arccos", false));
-    math.define("arcsin", op("arcsin", false));
-    math.define("arctan", op("arctan", false));
-    math.define("arg", op("arg", false));
-    math.define("cos", op("cos", false));
-    math.define("cosh", op("cosh", false));
-    math.define("cot", op("cot", false));
-    math.define("coth", op("coth", false));
-    math.define("csc", op("csc", false));
-    math.define("deg", op("deg", false));
-    math.define("det", op("det", true));
-    math.define("dim", op("dim", false));
-    math.define("exp", op("exp", false));
-    math.define("gcd", op("gcd", true));
-    math.define("hom", op("hom", false));
-    math.define("inf", op("inf", true));
-    math.define("ker", op("ker", false));
-    math.define("lg", op("lg", false));
-    math.define("lim", op("lim", true));
-    math.define("ln", op("ln", false));
-    math.define("log", op("log", false));
-    math.define("max", op("max", true));
-    math.define("min", op("min", true));
-    math.define("Pr", op("Pr", true));
-    math.define("sec", op("sec", false));
-    math.define("sin", op("sin", false));
-    math.define("sinh", op("sinh", false));
-    math.define("sup", op("sup", true));
-    math.define("tan", op("tan", false));
-    math.define("tanh", op("tanh", false));
-    math.define("liminf", op("lim inf", true));
-    math.define("limsup", op("lim sup", true));
+macro_rules! ops {
+    ($($name:ident $(: $value:literal)? $(($tts:tt))?),* $(,)?) => {
+        pub(super) fn define(math: &mut Scope) {
+            $(math.define(
+                stringify!($name),
+                OpNode {
+                    text: ops!(@name $name $(: $value)?).into(),
+                    limits: ops!(@limit $($tts)*),
+                }.pack()
+            );)*
+        }
+    };
+    (@name $name:ident) => { stringify!($name) };
+    (@name $name:ident: $value:literal) => { $value };
+    (@limit limits) => { true };
+    (@limit) => { false };
 }
 
-fn op(name: &str, limits: bool) -> Content {
-    OpNode { text: name.into(), limits }.pack()
+ops! {
+    arccos,
+    arcsin,
+    arctan,
+    arg,
+    cos,
+    cosh,
+    cot,
+    coth,
+    csc,
+    deg,
+    det (limits),
+    dim,
+    exp,
+    gcd (limits),
+    hom,
+    mod,
+    inf (limits),
+    ker,
+    lg,
+    lim (limits),
+    ln,
+    log,
+    max (limits),
+    min (limits),
+    Pr (limits),
+    sec,
+    sin,
+    sinh,
+    sup (limits),
+    tan,
+    tanh,
+    liminf: "lim inf" (limits),
+    limsup: "lim sup" (limits),
 }
diff --git a/library/src/math/spacing.rs b/library/src/math/spacing.rs
index d5a7603d5..cf86b6988 100644
--- a/library/src/math/spacing.rs
+++ b/library/src/math/spacing.rs
@@ -7,7 +7,7 @@ const THICK: Em = Em::new(5.0 / 18.0);
 const QUAD: Em = Em::new(1.0);
 
 /// Hook up all spacings.
-pub(super) fn define_spacings(math: &mut Scope) {
+pub(super) fn define(math: &mut Scope) {
     math.define("thin", HNode::strong(THIN).pack());
     math.define("med", HNode::strong(MEDIUM).pack());
     math.define("thick", HNode::strong(THICK).pack());