C ⌫ \(\pi\) e \(\frac{a}{b}\) ! ← → ( ) \(\sqrt{\,}\) \(a^{b}\) 7 8 9 \(\div\) log ln 4 5 6 \(\times\) cos cos⁻¹ 1 2 3 - sin sin⁻¹ 0 . = + tan tan⁻¹