HELP with Table

Questions
1

I am trying to have this table check students accuracy, but it’s open ended.

Can anyone help me with the computational layering?

2

Did you want 6x to be in the first cell and 7x to be in the cell below it? Or would you be fine with the student entering “6x+7x” all in one cell? This is coding for the latter:

#this prevents numbers computing to an answer automatically within the cell                   
cellDisableEvaluation(1,2): true
cellDisableEvaluation(2,2): true
cellDisableEvaluation(1,3): true
cellDisableEvaluation(2,3): true

#variables equal to the function and value
f1= simpleFunction("13x")
f2= 7

#variables for student input from the table
n1= simpleFunction(this.cellContent(1,2))
n2= this.cellContent(1,3)
n3= simpleFunction(this.cellContent(2,2))
n4= this.cellContent(2,3)

#set up "check" variables so that you don't have to repeat the conditions when you want to use it in multiple places
#check1 uses the evaluateAt command that matches with the simpleFunction code, it's wise to check with at least 2 values
check1= f1.evaluateAt(2)=n1.evaluateAt(2) and f1.evaluateAt(3)=n1.evaluateAt(3)
check2= f2=numericValue(n2)
check3= f1.evaluateAt(2)=n3.evaluateAt(2) and f1.evaluateAt(3)=n3.evaluateAt(3)
check4= f2=numericValue(n4)

#this gives the feedback to the students
cellContent(3,2): when check1 and check3 "✅" otherwise "" 
cellContent(3,3): when check2 and check4 "✅" otherwise ""

#this gives the checkmark in teacher dashboard view
correct: check1 and check2 and check3 and check4
3

I want students to come up with any two terms that will add to be 13x