To solve this expression, we can use the order of operations, also known as PEMDAS, which stands for Parentheses, Exponents, Multiplication and Division (performed left to right), and Addition and Subtraction (performed left to right).
Following this order, we first need to evaluate the exponent, which gives:
1000^3 = 1,000,000,000
Then, we can substitute this value back into the expression:
1000 + 1000^3 = 1000 + 1,000,000,000 = 1,000,000,000 + 1000 = 1,000,001,000
Therefore, 1000 + 1000^3 equals 1,000,001,000.