diff --git a/src/math/Vector4.js b/src/math/Vector4.js
index a8bdf1121c3706ae189f99964ed54d3a6396b4b3..6d8fd0a4e9f2e9558584f338ef7ea56e3a1340c1 100644
--- a/src/math/Vector4.js
+++ b/src/math/Vector4.js
@@ -299,18 +299,18 @@ THREE.Vector4.prototype = {
 			m21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ],
 			m31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ];
 
-		if ( ( Math.abs( m12 - m21 ) < epsilon )
-		   && ( Math.abs( m13 - m31 ) < epsilon )
-		   && ( Math.abs( m23 - m32 ) < epsilon ) ) {
+		if ( ( Math.abs( m12 - m21 ) < epsilon ) &&
+		     ( Math.abs( m13 - m31 ) < epsilon ) &&
+		     ( Math.abs( m23 - m32 ) < epsilon ) ) {
 
 			// singularity found
 			// first check for identity matrix which must have +1 for all terms
 			// in leading diagonal and zero in other terms
 
-			if ( ( Math.abs( m12 + m21 ) < epsilon2 )
-			   && ( Math.abs( m13 + m31 ) < epsilon2 )
-			   && ( Math.abs( m23 + m32 ) < epsilon2 )
-			   && ( Math.abs( m11 + m22 + m33 - 3 ) < epsilon2 ) ) {
+			if ( ( Math.abs( m12 + m21 ) < epsilon2 ) &&
+			     ( Math.abs( m13 + m31 ) < epsilon2 ) &&
+			     ( Math.abs( m23 + m32 ) < epsilon2 ) &&
+			     ( Math.abs( m11 + m22 + m33 - 3 ) < epsilon2 ) ) {
 
 				// this singularity is identity matrix so angle = 0
 
@@ -395,9 +395,9 @@ THREE.Vector4.prototype = {
 
 		// as we have reached here there are no singularities so we can handle normally
 
-		var s = Math.sqrt( ( m32 - m23 ) * ( m32 - m23 )
-						  + ( m13 - m31 ) * ( m13 - m31 )
-						  + ( m21 - m12 ) * ( m21 - m12 ) ); // used to normalize
+		var s = Math.sqrt( ( m32 - m23 ) * ( m32 - m23 ) +
+		                   ( m13 - m31 ) * ( m13 - m31 ) +
+		                   ( m21 - m12 ) * ( m21 - m12 ) ); // used to normalize
 
 		if ( Math.abs( s ) < 0.001 ) s = 1;