diff --git a/src/_icons/math-x-minus-x.svg b/src/_icons/math-x-minus-x.svg
new file mode 100644
index 000000000..75b11ae2c
--- /dev/null
+++ b/src/_icons/math-x-minus-x.svg
@@ -0,0 +1,9 @@
+---
+---
+<svg>
+  <path d="M2 9l6 6" />
+  <path d="M2 15l6 -6" />
+  <path d="M16 9l6 6" />
+  <path d="M16 15l6 -6" />
+  <path d="M10 12h4" />
+</svg>
diff --git a/src/_icons/math-x-plus-x.svg b/src/_icons/math-x-plus-x.svg
new file mode 100644
index 000000000..df46f4ff9
--- /dev/null
+++ b/src/_icons/math-x-plus-x.svg
@@ -0,0 +1,10 @@
+---
+---
+<svg>
+  <path d="M2 9l6 6" />
+  <path d="M2 15l6 -6" />
+  <path d="M16 9l6 6" />
+  <path d="M16 15l6 -6" />
+  <path d="M10 12h4" />
+  <path d="M12 10v4" />
+</svg>
diff --git a/src/_icons/math-y-minus-y.svg b/src/_icons/math-y-minus-y.svg
new file mode 100644
index 000000000..32cd4406e
--- /dev/null
+++ b/src/_icons/math-y-minus-y.svg
@@ -0,0 +1,9 @@
+---
+---
+<svg>
+  <path d="M2 9l3 5.063" />
+  <path d="M8 9l-4.8 9" />
+  <path d="M16 9l3 5.063" />
+  <path d="M22 9l-4.8 9" />
+  <path d="M10 12h4" />
+</svg>
diff --git a/src/_icons/math-y-plus-y.svg b/src/_icons/math-y-plus-y.svg
new file mode 100644
index 000000000..c503898c2
--- /dev/null
+++ b/src/_icons/math-y-plus-y.svg
@@ -0,0 +1,10 @@
+---
+---
+<svg>
+  <path d="M2 9l3 5.063" />
+  <path d="M8 9l-4.8 9" />
+  <path d="M16 9l3 5.063" />
+  <path d="M22 9l-4.8 9" />
+  <path d="M10 12h4" />
+  <path d="M12 10v4" />
+</svg>