Help Rotating A Matrix

I suck at matrixes

I added the prerotate to this piece of code:

local mymatrix = matrix3 1
spinner spn_spinnerx "X Amount"
spinner spn_spinnery "Y Amount"
spinner spn_spinnerz "Z Amount"
button translate_matrix "Translate Matrix"
on translate_matrix pressed do
(
mytransM = transMatrix [spn_spinnerx.value, spn_spinnery.value, spn_spinnerz.value] -----Here i need help i think
mymatrix = mymatrix*mytransM
format "mymatrix = %\n" mymatrix
)

button scale_matrix "Scale Matrix"
on scale_matrix pressed do
(
myscaleM = scaleMatrix [spn_spinnerx.value, spn_spinnery.value, spn_spinnerz.value] -----Here i need help i think
mymatrix = mymatrix*myscaleM
format "mymatrix = %\n" mymatrix
)
button rotate_matrix "Rotate Matrix"
on rotate_matrix pressed do
(
myrotateM = preRotate [spn_spinnerx.value, spn_spinnery.value, spn_spinnerz.value] -----Here i need help i think
mymatrix = mymatrix*myrotateM
format "mymatrix = %\n" mymatrix
)

It is within a rollout but still chucks back an error when i try to do the rotate matrix???

Thanks for all your help!!