d - ( \frac { \Delta } { v }
Evaluate
d-\frac{\Delta }{v}
Differentiate w.r.t. d
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\frac{dv}{v}-\frac{\Delta }{v}
To add or subtract expressions, expand them to make their denominators the same. Multiply d times \frac{v}{v}.
\frac{dv-\Delta }{v}
Since \frac{dv}{v} and \frac{\Delta }{v} have the same denominator, subtract them by subtracting their numerators.
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