Command Partial Fractions Expression 
- A fraction: the numerator of the fraction is z; the denominator of the fraction is a product comprising 2 factors; the 1st factor of the product is equal to a sum of 2 terms; the 1st term of the sum is z; the 2nd term of the sum is equal to a negative; the 2nd factor of the product is equal to a sum consisting of 2 terms; the 1st term of the sum is z; the 2nd term of the sum is negative b;
- z divided by left bracket z plus a negative right bracket multiplied by open brace z plus negative b close brace;
Result
- A sum that consists of 2 terms; the 1st term of the sum is a fraction: the numerator of the fraction is b; the denominator of the fraction is a product comprising 2 factors; the 1st factor of the product is equal to a sum that contains 2 terms; the 1st term of the sum is equal to b; the 2nd term of the sum is equal to a negative; the 2nd factor of the product is equal to a sum of 2 terms; the 1st term of the sum is equal to z; the 2nd term of the sum is negative b; the 2nd term of the sum is a negative quotient: dividend of the quotient is a; divisor of the quotient is a product comprising 2 factors; the 1st factor of the product is equal to a sum consisting of 2 terms; the 1st term of the sum is equal to b; the 2nd term of the sum is equal to a negative; the 2nd factor of the product is a sum of 2 terms; the 1st term of the sum is equal to z; the 2nd term of the sum is equal to a negative;
- b over left parenthesis b plus a negative right parenthesis multiplied by open bracket z plus negative b close bracket plus a negative divided by left parenthesis b plus a negative right parenthesis multiplied by opening bracket z plus a negative closing bracket.
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