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Number of square-triangle (square triangular number)

Number of square-triangle has the properties of a square and a triangular number.          


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Conversion between number bases

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Trigonometric functions calculator

Calculator by entering an angle in degrees or radians calculated values ​​of the basic trigonometric functions.
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Jak obliczyć pole walca?
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Calculator based on the introduced: the radius of the cylinder base and calculates the area and volume.              
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The rate of breakdown of proteins by hemodialysis (Protein catabolic rate)

The calculator is helpful for people suffering from liver disease and undergoing dialysis. Allows you to calculate on the basis of input PCR, which determines the rate of protein breakdown.        
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Rainwater tank

The calculator calculates the amount of collected rainwater from the roof of the given dimensions. Long description      
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Calculator burn calories (kcal). How many calories you burn a day?

Ile kalorii spalamy? Ile kalorii potrzebuję?
The calculator calculates how many calories you burn per day based on the data entered.
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The harmonic mean

Calculator based on the entered numbers separated by commas calculate the harmonic mean.