Evaluate
-\frac{17m}{28u}
Differentiate w.r.t. m
-\frac{17}{28u}
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\frac{4m}{28u}-\frac{7\times 3m}{28u}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of 7u and 4u is 28u. Multiply \frac{m}{7u} times \frac{4}{4}. Multiply \frac{3m}{4u} times \frac{7}{7}.
\frac{4m-7\times 3m}{28u}
Since \frac{4m}{28u} and \frac{7\times 3m}{28u} have the same denominator, subtract them by subtracting their numerators.
\frac{4m-21m}{28u}
Do the multiplications in 4m-7\times 3m.
\frac{-17m}{28u}
Combine like terms in 4m-21m.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Linear equation
y = 3x + 4
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Matrix
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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