Evaluate
3
Factor
3
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\frac{15+6}{7}
Since \frac{15}{7} and \frac{6}{7} have the same denominator, add them by adding their numerators.
\frac{21}{7}
Add 15 and 6 to get 21.
3
Divide 21 by 7 to get 3.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
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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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