5/3 (a)(x)(b)(xx)(c)(a^3)
5/3 (a^4)(b)(c)(x^3)
-2.07 (a^2)(x^3)(a^2)(b)
-2.07 (a^4)(b)(x^3)
-7/6 (a^2)(x^3)(c)(a^2)(b)
-7/6 (a^4)(b)(c)(x^3)
Notice that only the first and third monomials (when simplified) contain the exact same variables with the same exponents. Therefore, those are the only two monomials we can add together.
(10/6 - 7/6)(a^4)(b)(c)(x^3) - 2.07(a^4)(b)(x^3)
(1/2)(a^4)(b)(c)(x^3) - (2.07)(a^4)(b)(x^3)
(a^4bx^3)(1/2c - 2.07) --- Factored form
Since this expression has two terms, it is a binomial.
Hope this helps!! :)
