$\left(-a^2-3b\right)^2$
$36\sin^2x+164cos^2x$
$\lim_{x\to-8}\left(\frac{x^3+512}{x+8}\right)$
$3x^2=x+2$
$-23\cdot4$
$243-y^5$
$\frac{64m^6-729n^6}{2a+3n}$
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