$y^{\prime}=3x^2-6x-9$ (接線の傾き)
$y^{\prime}=\frac{(x-3)(3x+1)}{(x^2+1)^2}$ (接線の傾き)
$y^{\prime}=\frac{-2(x-1)(x+1)}{(x^2+1)^2}$ (接線の傾き)
$y^{\prime}=-2x e^{-x^2}$ (接線の傾き)
$y^{\prime}=-2(x-3)\sqrt{\frac{x}{4-x}}$ (接線の傾き)
$y^{\prime}=8\cos(2x-\frac{\pi}{3})$ (接線の傾き)
$y^{\prime}=\frac{-3 + x}{\sqrt{9 - (-3 + x)^2}}$ (接線の傾き)
$y^{\prime}=2\cos x \sin x$ (接線の傾き)
$y^{\prime}=-\frac{1}{5} e^{\frac{x}{5}} \cos 3x - 3 e^{\frac{x}{5}} \sin 3x $ (接線の傾き)