what is wrong with the code?

from tensorflow.keras.models import Sequential

from tensorflow.keras.layers import Embedding, SimpleRNN, Dense

model $=$ Sequential$()$

model.add$($Embedding$($input$\_$dim$=$vocab$\_$size, output$\_$dim$=10,$ input$\_$length$=$max$\_$length$))$

model.add$($SimpleRNN$(50))$

model.add$($Dense$(6,$ activation$=$'relu'$))$

model.add$($Dense$(1,$ activation$=$'sigmoid'$))$