1. The problem is to simplify the expression $30x^2 +$ (incomplete expression). 2. Since the expression is incomplete, we can only simplify what is given: $30x^2$. 3. This term is already simplified as it is a monomial with coefficient 30 and variable $x$ raised to the power 2. 4. Without additional terms or operations, the expression remains $30x^2$. Final answer: $30x^2$