| 816 | Arithmetic means with quadratic endpoints | Deep | arithmetic progressionmeans | |
| 844 | Relation of terms from sum ratios | Deep | sum of arithmetic progressionterm ratio | |
| 1022 | Infinite GP from sum and sum of cubes | Deep | Infinite geometric seriesSeries of powers | |
| 1044 | Limit of a geometric term | Deep | inequalitieslimits+1 | |
| 1048 | Ratio from means | Deep | Harmonic meanGeometric mean+1 | |
| 1058 | Sum of mixed exponential‑polynomial series | Deep | SummationGeometric series+1 | |
| 1059 | Ratio of difference to first term | Deep | Arithmetic progressionGeometric progression+1 | |
| 1060 | Relation of first term to difference | Deep | Geometric progressionArithmetic progression+1 | |
| 1064 | Bounds for harmonic means | Deep | arithmetic meansharmonic means+1 | |
| 1464 | Greatest term with powers and parameters | Deep | Binomial theoremGreatest term | |
| 1480 | Transformed Binomial Expansion | Deep | Binomial TheoremSeries Expansion | |
| 1535 | Sum Identity with Triangular Numbers | Deep | Binomial TheoremCoefficient Extraction | |
| 1536 | Sum of Products of q Coefficients | Deep | Binomial TheoremSeries Expansion | |
| 1537 | Alternating Sum of q Products | Deep | Binomial TheoremGenerating Functions | |
| 1638 | Annuity Purchase Rate | Deep | annuitiesgeometric series+1 | |
| 1640 | Depleting Capital | Deep | recurrence relationsfinancial ruin | |
| 1642 | Annuity Purchase Relations | Deep | annuitiesgeometric series | |
| 1735 | Cubic Root Expansion and Approximation | Deep | Undetermined coefficientsSeries approximation | |
| 1736 | Infinite Product Coefficient | Deep | Infinite productsGenerating functions | |
| 1751 | General Term with Repeated Linear Factor | Deep | Partial fractionsRepeated factors+1 | |
| 1752 | Expansion with Squared Linear Factor | Deep | Partial fractionsRepeated factors+1 | |
| 1755 | General term with squared quadratic factor | Deep | Partial fractionsBinomial theorem | |
| 1761 | Generating function with missing powers | Deep | recurring seriesgenerating function | |
| 1762 | Third-order recurring series | Deep | recurring seriesgenerating function | |
| 1765 | Complex recurring series | Deep | recurring seriesscale of relation | |
| 1770 | Scales of recurring series product | Deep | recurring seriesscale of relation+1 | |
| 1771 | Scale of summed recurring series | Deep | recurring seriespartial sums+1 | |
| 1892 | Sum of series with telescoping terms II | Deep | Telescoping seriesPartial fractions | |
| 1900 | Sum of homogeneous products | Deep | Finite differencesGenerating functions | |
| 1901 | Sum of binomial series coefficients | Deep | Binomial theoremSeries summation | |