Evaluate
\frac{31}{30}\approx 1.033333333
Factor
\frac{31}{2 \cdot 3 \cdot 5} = 1\frac{1}{30} = 1.0333333333333334
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\frac{1}{2}\left(\frac{3+2}{3}+\frac{2}{5}\right)
Multiply 1 and 3 to get 3.
\frac{1}{2}\left(\frac{5}{3}+\frac{2}{5}\right)
Add 3 and 2 to get 5.
\frac{1}{2}\left(\frac{25}{15}+\frac{6}{15}\right)
Least common multiple of 3 and 5 is 15. Convert \frac{5}{3} and \frac{2}{5} to fractions with denominator 15.
\frac{1}{2}\times \frac{25+6}{15}
Since \frac{25}{15} and \frac{6}{15} have the same denominator, add them by adding their numerators.
\frac{1}{2}\times \frac{31}{15}
Add 25 and 6 to get 31.
\frac{1\times 31}{2\times 15}
Multiply \frac{1}{2} times \frac{31}{15} by multiplying numerator times numerator and denominator times denominator.
\frac{31}{30}
Do the multiplications in the fraction \frac{1\times 31}{2\times 15}.
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}