$2\sin\left(4x\right)=-2$
$1-2\sin^2\left(\frac{3\pi}{11}\right)$
$-2\cdot39$
$5x^2+26x+5=0$
$18-15-12-36+95-5+18$
$\frac{\left(x+4\right)}{x}$
$\frac{\left(2m^3n^{-2}\right)^{-1}}{m^3n^4}$
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