Evaluate
\frac{21n^{2}m^{3}}{2\left(u-b\right)}
Expand
-\frac{21n^{2}m^{3}}{2\left(b-u\right)}
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\frac{3m^{2}n\times 7mn}{2u-2b}
Divide 3m^{2}n by \frac{2u-2b}{7mn} by multiplying 3m^{2}n by the reciprocal of \frac{2u-2b}{7mn}.
\frac{3m^{3}n\times 7n}{2u-2b}
To multiply powers of the same base, add their exponents. Add 2 and 1 to get 3.
\frac{3m^{3}n^{2}\times 7}{2u-2b}
Multiply n and n to get n^{2}.
\frac{21m^{3}n^{2}}{2u-2b}
Multiply 3 and 7 to get 21.
\frac{3m^{2}n\times 7mn}{2u-2b}
Divide 3m^{2}n by \frac{2u-2b}{7mn} by multiplying 3m^{2}n by the reciprocal of \frac{2u-2b}{7mn}.
\frac{3m^{3}n\times 7n}{2u-2b}
To multiply powers of the same base, add their exponents. Add 2 and 1 to get 3.
\frac{3m^{3}n^{2}\times 7}{2u-2b}
Multiply n and n to get n^{2}.
\frac{21m^{3}n^{2}}{2u-2b}
Multiply 3 and 7 to get 21.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}