a: (2x-1)^8
\(=\sum_{k=0}^8C^k_8\cdot\left(2x\right)^k\cdot\left(-1\right)^{8-k}\)
=
b: (x-2y)^7
\(=\sum_{k=0}^n\cdot C^k_7\cdot x^{7-k}\cdot\left(-2y\right)^k\)
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c: (x+4)^11
\(=\sum_{k=0}^n\cdot C^k_{11}\cdot x^{11-k}\cdot4^k\)
=
d: (-x+3)^6=(x-3)^6
\(=\sum_{k=0}^6\cdot x^{6-k}\cdot\left(-3\right)^k\)
e: (-x+2)^4=(x-2)^4
\(=\sum_{k=0}^4\cdot C^k_4\cdot x^{4-k}\cdot\left(-2\right)^k\)
=
f: (-x-y)^7
\(=\sum_{k=0}^7\cdot C^k_7\cdot\left(-x\right)^{7-k}\cdot\left(-y\right)^k\)
=
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