$\lim_{x\to\frac{-3}{2}}\left(\frac{6+4x}{216+64x^3}\right)$
$d^4+2d^2-3md$
$\lim_{x\to0}\left(\frac{1}{x^2+x}-\frac{1}{sin\left(x\right)}\right)$
$\left(7y^2+3\right)\left(7y^2-3\right)$
$c^3-27d^3$
$\int\left(49+x^2\right)^{-4}dx$
$2x\cdot y+3y$
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