$\frac{35m^2n}{7m^{-2}n^{-1}}$
$\lim_{x\to\infty}\left(x\cdot\sqrt{1-cos\left(\frac{\pi}{2x}\right)}\right)$
$\int\left(4x+1\right)\cos\left(5x\right)dx$
$\left(z-\sqrt{15}\right)^2$
$\frac{3x^4-6x^2-x}{x}$
$\sqrt{4e^2}4$
$\left(4x+3y\right)\left(gx-5y\right)$
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