2ndf Mem Error 2ndf {x} [x] arcsin sin arcsinh sinh 2π π eⁿ ln -Abs Abs arccos cos arccosh cosh e 10ⁿ log 1/x arctan tan arctanh tanh xPy xCy logn x ⁿ√x xⁿ √x x² ∛x x³ x! Add M+ Subtract M- Clear MC Set MS Recall MR 7 4 1 0 Help 8 5 2 Back 9 6 3 . Clear / * - + AC MOD ± =