$\frac{x}{2}+\frac{x+1}{7}-x+2<\:0$
$b\sqrt[2]{\frac{a^2}{b^2}}$
$y=\frac{\sin\left(2x\right)^2}{1-\sin^2\left(x\right)}$
$\left(3a^2-5\right)^3$
$\lim_{x\to4}x^2+45$
$x+0+x$
$5cd^2+10c^2d-15cd$
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