u = t * 6 

each element of the array is multiplied by 6


u = t**6 

each element of the array is powered to 6


u = t + 6 

each element of the array is added by 6


u = sin(y)

the sin of each element of the array.

In short you can see that the mathematical operations are preformed individually on each element of the array. This includes any other mathematical operation.