Final answer:
The student's question seems to misrepresent a formula for calculating total resistance; typical formulas include the sum of resistors for series and the reciprocal sum for parallel configurations.
Step-by-step explanation:
The student's question involves simplifying a given formula for total resistance. The formula provided seems to be incorrectly typed as 'r=s (1/1t 1w)', which is not a standard expression for calculating resistance. A correct formula for calculating the total resistance in parallel circuitry is 1/Rtotal = 1/R1 + 1/R2 + ... + 1/Rn, where Rtotal is the equivalent resistance and R1 through Rn are the resistances of individual resistors.
Additionally, for resistors in series, the total resistance is simply the sum of all resistors, expressed as Rtotal = R1 + R2 + ... + Rn. In both cases, 's' could represent the series sum, and 't' and 'w' could represent individual resistances, although it's unusual to use such variables. To provide a more accurate simplification, it would be necessary to clarify the formula and the specific configuration of the resistors (series or parallel).