diff --git a/fgd/point/math/math_expression.fgd b/fgd/point/math/math_expression.fgd
new file mode 100644
index 000000000..d517c655d
--- /dev/null
+++ b/fgd/point/math/math_expression.fgd
@@ -0,0 +1,56 @@
+@PointClass base(BaseEntityPoint, EnableDisable)
+	iconsprite("editor/math_expression.vmt")
+= math_expression : "Evaluates a custom math expression, even more advanced version of math_counter_advanced."
+	[
+	spawnflags(flags) : "spawnflags" =
+		[
+		1 : "Evaluate manually" : 0
+		]
+
+	// Keys
+	Expression0(string) : "Expression 0" :: "Output0 is fired with the result of this expression."
+	Expression1(string) : "Expression 1" :: "Output1 is fired with the result of this expression."
+	Expression2(string) : "Expression 2" :: "Output2 is fired with the result of this expression."
+	Expression3(string) : "Expression 3" :: "Output3 is fired with the result of this expression."
+	Input0(float) : "in0 =" : 0 : "Set the intial value for the variable 'in0'."
+	Input1(float) : "in1 =" : 0 : "Set the intial value for the variable 'in1'."
+	Input2(float) : "in2 =" : 0 : "Set the intial value for the variable 'in2'."
+	Input3(float) : "in3 =" : 0 : "Set the intial value for the variable 'in3'."
+	Input4(float) : "in4 =" : 0 : "Set the intial value for the variable 'in4'."
+	Input5(float) : "in5 =" : 0 : "Set the intial value for the variable 'in5'."
+	Input6(float) : "in6 =" : 0 : "Set the intial value for the variable 'in6'."
+	Input7(float) : "in7 =" : 0 : "Set the intial value for the variable 'in7'."
+	Input8(float) : "in8 =" : 0 : "Set the intial value for the variable 'in8'."
+	Input9(float) : "in9 =" : 0 : "Set the intial value for the variable 'in9'."
+	Input10(float) : "in10 =" : 0 : "Set the intial value for the variable 'in10'."
+	Input11(float) : "in11 =" : 0 : "Set the intial value for the variable 'in11'."
+	Input12(float) : "in12 =" : 0 : "Set the intial value for the variable 'in12'."
+	Input13(float) : "in13 =" : 0 : "Set the intial value for the variable 'in13'."
+	Input14(float) : "in14 =" : 0 : "Set the intial value for the variable 'in14'."
+	Input15(float) : "in15 =" : 0 : "Set the intial value for the variable 'in15'."
+
+	// Inputs
+	input Eval(void) : "Evaluates all expressions."
+	input SetInput0(float) : "Set 'in0' to a new value."
+	input SetInput1(float) : "Set 'in1' to a new value."
+	input SetInput2(float) : "Set 'in2' to a new value."
+	input SetInput3(float) : "Set 'in3' to a new value."
+	input SetInput4(float) : "Set 'in4' to a new value."
+	input SetInput5(float) : "Set 'in5' to a new value."
+	input SetInput6(float) : "Set 'in6' to a new value."
+	input SetInput7(float) : "Set 'in7' to a new value."
+	input SetInput8(float) : "Set 'in8' to a new value."
+	input SetInput9(float) : "Set 'in9' to a new value."
+	input SetInput10(float) : "Set 'in10' to a new value."
+	input SetInput11(float) : "Set 'in11' to a new value."
+	input SetInput12(float) : "Set 'in12' to a new value."
+	input SetInput13(float) : "Set 'in13' to a new value."
+	input SetInput14(float) : "Set 'in14' to a new value."
+	input SetInput15(float) : "Set 'in15' to a new value."
+
+	// Outputs
+	output Output0(float) : "Fired in response to any of the inputs changing with value calculated from expression 0."
+	output Output1(float) : "Fired in response to any of the inputs changing with value calculated from expression 1."
+	output Output2(float) : "Fired in response to any of the inputs changing with value calculated from expression 2."
+	output Output3(float) : "Fired in response to any of the inputs changing with value calculated from expression 3."
+	]
diff --git a/fgd/visgroups.cfg b/fgd/visgroups.cfg
index 8adec129d..4388da448 100644
--- a/fgd/visgroups.cfg
+++ b/fgd/visgroups.cfg
@@ -399,6 +399,7 @@
 			* `math_bits`
 			* `math_clamp`
 			* `math_counter_advanced`
+			* `math_expression`
 			* `math_generate`
 			* `math_lightpattern`
 			* `math_mod`
diff --git a/hammer/materials/editor/math_expression.vmt b/hammer/materials/editor/math_expression.vmt
new file mode 100644
index 000000000..d25446a41
--- /dev/null
+++ b/hammer/materials/editor/math_expression.vmt
@@ -0,0 +1,8 @@
+Sprite
+{
+	$baseTexture "editor/math_expression"
+	$spriteorientation "vp_parallel"
+	$spriteorigin "[ 0.50 0.50 ]"
+	$spriterendermode 2
+	$no_fullbright 1
+}
diff --git a/hammer/materials/editor/math_expression.vtf b/hammer/materials/editor/math_expression.vtf
new file mode 100644
index 000000000..f435bc838
Binary files /dev/null and b/hammer/materials/editor/math_expression.vtf differ