$\left(-7-12\right)-\left(3-5\right)\cdot\left(-2\right)$
$\lim_{x\to1}\left(\frac{x^8-1}{x^{10}-1}\right)$
$\left(5x^2y^5-15z^3\right)^2$
$\int\left(sin\right)^2\left(ax\right)dx$
$\frac{15^n\left(x+2\right)^n\left(n+2\right)^2}{n^27^n}$
$\frac{9x^5+4}{2x+4}$
$1925\cdot101-1925$
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