sin cos tan log ln C sin⁻¹ cos⁻¹ tan⁻¹ log₁₀ eˣ ⌫ π e xʸ √ x! / MC MR M+ M- 7 8 ( ) 9 × 4 5 x² 1/x 6 – 1 2 |x| % 3 + 0 . ± RAND =