Evaluate
\frac{x^{2}}{9}+\frac{2y}{7}
Factor
\frac{7x^{2}+18y}{63}
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\frac{7x^{2}}{63}+\frac{9\times 2y}{63}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of 9 and 7 is 63. Multiply \frac{x^{2}}{9} times \frac{7}{7}. Multiply \frac{2y}{7} times \frac{9}{9}.
\frac{7x^{2}+9\times 2y}{63}
Since \frac{7x^{2}}{63} and \frac{9\times 2y}{63} have the same denominator, add them by adding their numerators.
\frac{7x^{2}+18y}{63}
Do the multiplications in 7x^{2}+9\times 2y.
\frac{7x^{2}+18y}{63}
Factor out \frac{1}{63}.
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Limits
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