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Intermediate Algebra
| Status | Title | Difficulty |
| 1853. Dot Cross Maximum Value | Level 4 | |
| 1854. Tangent Equality Angle | Level 5 | |
| 1855. Trigonometric Equation Solution 3 | Level 5 | |
| 1856. Reflection Matrix Determinant | Level 5 | |
| 1857. Arctan of Negative Fraction | Level 2 | |
| 1858. Line Intersection Angle | Level 4 | |
| 1859. System Non Trivial Solution | Level 5 | |
| 1860. Trigonometric Equation Solutions 3 | Level 2 | |
| 1861. Determinant Transformation | Level 1 | |
| 1862. Trigonometric Sum Simplification 1 | Level 3 | |
| 1863. Matrix Square Solution | Level 2 | |
| 1864. Complex Number Power | Level 3 | |
| 1865. Arccos of Negative Fraction | Level 1 | |
| 1866. Sine Degree Equivalence | Level 1 | |
| 1867. Polynomial With Cosine Root | Level 5 | |
| 1868. Vector Rotation and Reflection | Level 4 | |
| 1869. Trigonometric Equation Solutions 4 | Level 3 | |
| 1870. Trapezoid Sin2x Calculation | Level 5 | |
| 1871. Cosine of Pi | Level 1 | |
| 1872. Trigonometric Ratio Equation | Level 5 |