X*x*x=x3 k*k=k2 (7-n)(7-n)=? (x+1)(x+1)(x+1)=?

X*x*x=x³ k*k=k² (7-n)(7-n) =(7-n)²;ї (x+1)(x+1)(x+1)  = (х+1)³;