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To count the number of terms in the polynomial \( x^5 + 2x^3 - x^2 + 7 \), we identify each individual term separated by plus or minus signs. The polynomial has the following terms:
1. \( x^5 \)
2. \( 2x^3 \)
3. \( -x^2 \)
4. \( 7 \)
There are 4 distinct terms in total.
Therefore, the correct answer is **4 terms**.