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Combination of characters and numbers

Calculator allows to determine the existing combinations for the user-specified string.  


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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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Field parabola

The calculator calculates the surface area of ​​the parabola with the given base width and length of the perpendicular [see calculator squareness]. The result is given as the user input unit square.    
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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 index of renal failure (Renal Failure Index)

Calculator to the data: the amount of sodium in the urine, serum creatinine and urine of renal failure calculates the RFI.