the differential coefficient of y with respect to r; the first derivative of y with respect of x the second derivative of y with respect of r the nth derivative of y with respect of r dr the partial derivative of y with respect of u, where y is a function of u and another variable (or variables) integral of double integral of n-fold integral of integral between limits a and b(.from a to b) vector F a sub two twenty degrees seven minutes: seven feet thirteen seconds: thirteen inches 0C zero degree Centigrade(Celsius] one [a] hundred degrees Centigrade thirty-two degrees Fahrenheit