$\frac{14+6x^2}{x}$
$-2a+4a$
$3x+6\le0$
$-x^2+2x=-14$
$3y^2-2y-y^2+4y-12-5$
$2\sin^2\left(x\right)+\cos\left(2x\right)=4\cos\left(x\right)^2$
$30x^2-164-5x^2+20$
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