$\left(a-ab+b\right)^2$
$\sqrt{3}-2\sin\left(\frac{1}{3}x\right)$
$\sin\left(x\right)^2+\cos\left(-\frac{5}{13}\right)=1$
$-16x^2+25=25-15x^2$
$x^2+2x+2<0$
$2x-3y+z=3$
$y^2+9y+18$
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