Example

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

Question

$$\displaystyle\int{ { \sin }^{ 2 } \frac{ x }{ 2 } \cos \frac{ x }{ 2 } }d x$$

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