$-9x^{2}+2-2x+y+4y^{2}-2+3x^{2}+3y$
$y^{12}-1$
$x^6-14x^3+49$
$\frac{d}{dx}\:\frac{3}{x}-\frac{3}{y}=2y$
$\left(y^3z^2+5\right)^2$
$-261+-357$
$3^5a^7$
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