sin cos tan asin⁻¹ acos⁻¹ atan⁻¹ ln log₁₀ √ ∛ π e e^x x^y x² x³ ( ) 7 8 9 ÷ C ⌫ 4 5 6 × ± 1/x 1 2 3 – % x! 0 . + = |x|