The previous transforms are actually simplified versions of matrix mathematics. For example, translate is just applying additition using a matrix.

Learn about matrix mathematics at MathIsFun.com

let m = new CSG.Matrix4x4()
m = m.multiply(CSG.Matrix4x4.rotationX(40))
m = m.multiply(CSG.Matrix4x4.rotationZ(40))
m = m.multiply(CSG.Matrix4x4.translation([-.5, 0, 0]))
m = m.multiply(CSG.Matrix4x4.scaling([1.1, 1.2, 1.3]))
 
// and apply the transform:
let cube3 = cube().transform(m)