$2x+\frac{1}{4}y+\frac{3}{4}x+y$
$5x+2=127$
$\frac{4x+6}{2};\:x=2$
$-3\left(1+4x\right)$
$4x^2-16x+20\ge0$
$2sin^2\left(x\right)-1=5$
$2\sin x\:+\:\sqrt{2}=0$
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