Evaluate
15
Factor
3\times 5
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\frac{13+17}{2}
Since \frac{13}{2} and \frac{17}{2} have the same denominator, add them by adding their numerators.
\frac{30}{2}
Add 13 and 17 to get 30.
15
Divide 30 by 2 to get 15.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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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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