1.   By means of tapping his foot the horse could perform mathematical calculations, and solve problems of musical harmony.

2.   Computers are widely used because cost estimating May involve complex mathematical calculations and require advanced mathematical techniques.

3.   Needing to do something, anything, he rapidly tapped the spoon against the saucer as though preoccupied with a mathematical calculation.

4.   The mathematical calculations are not easy, but the concepts are relatively familiar.

5.   However, it may give rise to the necessity for a fairly sophisticated mathematical calculation if a conversion table is not published.

6.   And he produced the mathematical calculations to prove it.

7.   Babbage was driven to develop his Difference Engine by the belief that there could be a foolproof mechanical way of making mathematical calculations.

8.   At times he can recite a line or two of Pushkin, or do a mathematical calculation in his head.

9.   Early versions of the Pentium sometimes had trouble with some mathematical calculations.

10.   Even so, these are handy gadgets, since they can keep track of when assignments are due as well as perform mathematical calculations.