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MC MR M+ M− AC sin cos tan log ln sin⁻¹ cos⁻¹ tan⁻¹ √ x² π e xⁿ 1/x % ( ) ÷ × ⌫ 7 8 9 − |x| 4 5 6 + ⌈x⌉ 1 2 3 ⌊x⌋ = 0 . +/−