• ← CoefficientList
• → Denominator

Collect

WMA link

Collect[expr, x]

Expands expr and collect together terms having the same power of x.

Collect[expr, {$x_1$, $x_2$, ...}]

Expands expr and collect together terms having the same powers of $x_1$, $x_2$, ....

Collect[expr, {$x_1$, $x_2$, ...}, filter]

After collect the terms, applies filter to each coefficient.

• • Collect[(x+y)^3, y]

• • Collect[2 Sin[x z] (x+2 y^2 + Sin[y] x), y]

• • Collect[3 x y+2 Sin[x z] (x+2 y^2 + x) + (x+y)^3, y]

• • Collect[3 x y+2 Sin[x z] (x+2 y^2 + x) + (x+y)^3, {x,y}]

• • Collect[3 x y+2 Sin[x z] (x+2 y^2 + x) + (x+y)^3, {x,y}, h]

Collect each power of x:

• • Collect[(1 + a + x)^3, x]

Collect terms involving y:

• • Collect[a x + b y + c x + d y, y]

Simplify each coefficient:

• • Collect[(1 + a + x)^3, x, Simplify]