$\left(\csc^2u-1\right)\sin^2u$
$11x^2-153x-180$
$\left(x-6^2\right)$
$p-3\:=\:-4$
$\int_0^{\infty}\left(\frac{4x}{x^2+1}-\frac{28}{7x+1}\right)dx$
$\frac{3^{-2}}{3^{-5}}$
$4x^2-2x-2x+1$
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