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Addition: 5 + 3 + 12.5 = 20.5
Subtraction: 12.5 - 5 -3 = 4.5
Multiplication: 5 × 3 = 15
Division: 5 ÷ 3 = 1.66666667
Percentage: 30% × 200 = 60
Percentage change: 200+50% = 300 (short writing)
Exponentation: 2^8 = 256
Square root: √64 = 8
Logarithm: log(100) = 2
Natural logarithm: ln(e) = 1
Sine: sin(90) = 1
