$\frac{dv}{dw}=-\sin\left(3w\right)$
$\lim_{x\to0}\left(x^2+x\right)\ln\left(x\right)$
$3\left(4+5\right)-2$
$\frac{9xy^7}{15x^7y^3}$
$\left(9a^3-a^2-b\right)^2$
$\int\frac{-104x+156}{\left(x^2-36\right)\left(x^2+16\right)}dx$
$\left(x-21\right)\left(x+3\right)$
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