diff --git a/icons/outline/buildings.svg b/icons/outline/buildings.svg
index df316a78f..dfc2413cc 100644
--- a/icons/outline/buildings.svg
+++ b/icons/outline/buildings.svg
@@ -13,15 +13,15 @@ category: Buildings
   stroke-linecap="round"
   stroke-linejoin="round"
 >
-  <path d="M 4,21 V 6 C 4,5 5,4 6,4 h 5 c 1,0 2,1 2,2 v 15" />
-  <path d="m 16,8 h 2 c 1,0 2,1 2,2 v 11" />
-  <path d="M3 21H21" />
-  <path d="M10 12V12" />
-  <path d="M10 16V16" />
-  <path d="M10 8V8" />
-  <path d="M7 12V12" />
-  <path d="M7 16V16" />
-  <path d="M7 8V8" />
-  <path d="M17 12V12" />
-  <path d="M17 16V16" />
+  <path d="M4 21v-15c0 -1 1 -2 2 -2h5c1 0 2 1 2 2v15" />
+  <path d="M16 8h2c1 0 2 1 2 2v11" />
+  <path d="M3 21h18" />
+  <path d="M10 12v0" />
+  <path d="M10 16v0" />
+  <path d="M10 8v0" />
+  <path d="M7 12v0" />
+  <path d="M7 16v0" />
+  <path d="M7 8v0" />
+  <path d="M17 12v0" />
+  <path d="M17 16v0" />
 </svg>
diff --git a/icons/outline/math-ctg.svg b/icons/outline/math-ctg.svg
new file mode 100644
index 000000000..06cd84fc0
--- /dev/null
+++ b/icons/outline/math-ctg.svg
@@ -0,0 +1,18 @@
+<!--
+-->
+<svg
+  xmlns="http://www.w3.org/2000/svg"
+  width="24"
+  height="24"
+  viewBox="0 0 24 24"
+  fill="none"
+  stroke="currentColor"
+  stroke-width="2"
+  stroke-linecap="round"
+  stroke-linejoin="round"
+>
+  <path d="M10 8h4" />
+  <path d="M21 8h-2a2 2 0 0 0 -2 2v4a2 2 0 0 0 2 2h2v-4h-1" />
+  <path d="M12 8v8" />
+  <path d="M7 10a2 2 0 1 0 -4 0v4a2 2 0 1 0 4 0" />
+</svg>
diff --git a/icons/outline/math-sec.svg b/icons/outline/math-sec.svg
new file mode 100644
index 000000000..c009b5917
--- /dev/null
+++ b/icons/outline/math-sec.svg
@@ -0,0 +1,18 @@
+<!--
+-->
+<svg
+  xmlns="http://www.w3.org/2000/svg"
+  width="24"
+  height="24"
+  viewBox="0 0 24 24"
+  fill="none"
+  stroke="currentColor"
+  stroke-width="2"
+  stroke-linecap="round"
+  stroke-linejoin="round"
+>
+  <path d="M3 15c.345 .6 1.258 1 2 1a2 2 0 1 0 0 -4a2 2 0 1 1 0 -4c.746 0 1.656 .394 2 1" />
+  <path d="M21 10a2 2 0 1 0 -4 0v4a2 2 0 1 0 4 0" />
+  <path d="M14 8h-4v8h4" />
+  <path d="M10 12h2.5" />
+</svg>
diff --git a/icons/outline/math-tg.svg b/icons/outline/math-tg.svg
new file mode 100644
index 000000000..c31fcee6d
--- /dev/null
+++ b/icons/outline/math-tg.svg
@@ -0,0 +1,17 @@
+<!--
+-->
+<svg
+  xmlns="http://www.w3.org/2000/svg"
+  width="24"
+  height="24"
+  viewBox="0 0 24 24"
+  fill="none"
+  stroke="currentColor"
+  stroke-width="2"
+  stroke-linecap="round"
+  stroke-linejoin="round"
+>
+  <path d="M7 8h4" />
+  <path d="M9 8v8" />
+  <path d="M18 8h-2a2 2 0 0 0 -2 2v4a2 2 0 0 0 2 2h2v-4h-1" />
+</svg>