a: (x-2)^7
\(=C^0_7\cdot x^7\cdot\left(-2\right)^0+C^1_7\cdot x^6\cdot\left(-2\right)^1+...+C^7_7\cdot x^0\cdot\left(-2\right)^7\)
\(=x^7-14x^6+84x^5-280x^4+560x^3-672x^2+448x-128\)
b: (4y-3)^11
\(=C^0_{11}\cdot\left(4y\right)^{11}\cdot\left(-3\right)^0+C^1_{11}\cdot\left(4y\right)^{10}\cdot\left(-3\right)^1+...+C^{11}_{11}\cdot\left(4y\right)^0\cdot\left(-3\right)^{11}\)
=
c: (-x-y)^8=(x+y)^8
=
d: (x^2-3)^9
\(=C^0_9\cdot\left(x^2\right)^9\cdot\left(-3\right)^0+C^1_9\cdot\left(x^2\right)^8\cdot\left(-3\right)^1+...+C^9_9\cdot\left(x^2\right)^0\cdot\left(-3\right)^9\)
=
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