diff --git a/headers/vmath.hpp/vmath_ext.hpp b/headers/vmath.hpp/vmath_ext.hpp
index 6906715..19fd3cc 100644
--- a/headers/vmath.hpp/vmath_ext.hpp
+++ b/headers/vmath.hpp/vmath_ext.hpp
@@ -838,31 +838,6 @@ namespace vmath_hpp
         return v * qrotate(angle, axis);
     }
 
-    template < typename T >
-    [[nodiscard]] vec<T, 4> rotate_x(const vec<T, 4>& v, T angle) {
-        return v * qrotate(angle, unit3_x<T>);
-    }
-
-    template < typename T >
-    [[nodiscard]] vec<T, 4> rotate_y(const vec<T, 4>& v, T angle) {
-        return v * qrotate(angle, unit3_y<T>);
-    }
-
-    template < typename T >
-    [[nodiscard]] vec<T, 4> rotate_z(const vec<T, 4>& v, T angle) {
-        return v * qrotate(angle, unit3_z<T>);
-    }
-
-    template < typename T >
-    [[nodiscard]] vec<T, 4> rotate(const vec<T, 4>& v, const qua<T>& q) {
-        return v * q;
-    }
-
-    template < typename T >
-    [[nodiscard]] vec<T, 4> rotate(const vec<T, 4>& v, T angle, const vec<T, 3>& axis) {
-        return v * qrotate(angle, axis);
-    }
-
     // project
 
     template < typename T, std::size_t Size >
diff --git a/headers/vmath.hpp/vmath_qua_fun.hpp b/headers/vmath.hpp/vmath_qua_fun.hpp
index 41182cd..28e6cda 100644
--- a/headers/vmath.hpp/vmath_qua_fun.hpp
+++ b/headers/vmath.hpp/vmath_qua_fun.hpp
@@ -83,11 +83,6 @@ namespace vmath_hpp
         return xs + qv2 * ys.s + cross(ys.v, qv2);
     }
 
-    template < typename T >
-    [[nodiscard]] constexpr vec<T, 4> operator*(const vec<T, 4>& xs, const qua<T>& ys) {
-        return {vec<T, 3>{xs} * ys, xs.w};
-    }
-
     template < typename T >
     [[nodiscard]] constexpr qua<T> operator*(const qua<T>& xs, const qua<T>& ys) {
         /// REFERENCE:
@@ -110,11 +105,6 @@ namespace vmath_hpp
         return (xs = (xs * ys));
     }
 
-    template < typename T >
-    constexpr vec<T, 4>& operator*=(vec<T, 4>& xs, const qua<T>& ys) {
-        return (xs = (xs * ys));
-    }
-
     template < typename T >
     constexpr qua<T>& operator*=(qua<T>& xs, const qua<T>& ys) {
         return (xs = (xs * ys));
diff --git a/untests/vmath_ext_tests.cpp b/untests/vmath_ext_tests.cpp
index 2cea909..feea51b 100644
--- a/untests/vmath_ext_tests.cpp
+++ b/untests/vmath_ext_tests.cpp
@@ -324,13 +324,6 @@ TEST_CASE("vmath/ext/vector_transform") {
 
         REQUIRE(rotate(float3(1.5f,0.f,0.f), qrotate_z(radians(90.f))) == uapprox3(0.f,1.5f,0.f));
         REQUIRE(rotate(float3(1.5f,0.f,0.f), radians(90.f), float3(0,0,1)) == uapprox3(0.f,1.5f,0.f));
-
-        REQUIRE(rotate_x(float4(0.f,1.5f,0.f,2.f), radians(90.f)) == uapprox4(0.f,0.f,1.5f,2.f));
-        REQUIRE(rotate_y(float4(0.f,0.f,1.5f,2.f), radians(90.f)) == uapprox4(1.5f,0.f,0.f,2.f));
-        REQUIRE(rotate_z(float4(1.5f,0.f,0.f,2.f), radians(90.f)) == uapprox4(0.f,1.5f,0.f,2.f));
-
-        REQUIRE(rotate(float4(1.5f,0.f,0.f,2.f), qrotate_z(radians(90.f))) == uapprox4(0.f,1.5f,0.f,2.f));
-        REQUIRE(rotate(float4(1.5f,0.f,0.f,2.f), radians(90.f), float3(0,0,1)) == uapprox4(0.f,1.5f,0.f,2.f));
     }
 
     SUBCASE("project") {
diff --git a/untests/vmath_qua_fun_tests.cpp b/untests/vmath_qua_fun_tests.cpp
index e3e09a3..5c869e0 100644
--- a/untests/vmath_qua_fun_tests.cpp
+++ b/untests/vmath_qua_fun_tests.cpp
@@ -58,17 +58,9 @@ TEST_CASE("vmath/qua_fun") {
             REQUIRE(v == uapprox3(0.f,1.f,0.f));
         }
 
-        {
-            float4 v{1,0,0,2};
-            REQUIRE(&v == &(v *= fqua{0,0,0.7071067812f,0.7071067812f}));
-            REQUIRE(v == uapprox4(0.f,1.f,0.f,2.f));
-        }
-
         STATIC_REQUIRE(fqua{} * fqua{} == fqua{});
         STATIC_REQUIRE(float3{1,2,3} * fqua{} == uapprox3(1.f,2.f,3.f));
-        STATIC_REQUIRE(float4{1,2,3,4} * fqua{} == uapprox4(1.f,2.f,3.f,4.f));
         STATIC_REQUIRE(float3{1,0,0} * fqua{0,0,0.7071067812f,0.7071067812f} == uapprox3(0.f,1.f,0.f));
-        STATIC_REQUIRE(float4{1,0,0,2} * fqua{0,0,0.7071067812f,0.7071067812f} == uapprox4(0.f,1.f,0.f,2.f));
     }
 
     SUBCASE("Common Functions") {