Write an integer expression that equals 10. it must contain at least 2 positive integers and 2 negative integers. it also must contain at least one addition symbol and one subtraction symbol

Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)