#1 " Translate into a mathematical expression: the product of 4 and n."
product is multiplying which is symbol *
so 4*n=4n (We can remove the symbol as well.)
#2 "
Translate into a mathematical expression: the difference between 8 and n."
The difference is subtraction sign, -
8-n
#3
Translate into a mathematical expression: the quotient of 6 and n.
Quotient is divide,
6/n
#4
Translate into a mathematical expression: the sum of 3 times m and 5.
The sum of 3 times m and 5
well 3*m=3m
3m+5