$\sin\left(2x\right)=2\cos\left(x\right)\cos\left(2x\right)$
$x3-5x-15x$
$-5+1o=w$
$-2x=14$
$2x^2+4x+2$
$-1^5-\left(-1^2\right)$
$2^{\frac{24}{4}}$
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