Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$\frac{1-\cos\ x}{x^{2}}$$

Evaluate

$\frac{-\cos(x)+1}{x^{2}}$

Differentiate w.r.t. x

$\frac{x\sin(x)+2\cos(x)-2}{x^{3}}$

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