$\int\left(2\sec\left(4y\right)\right)dy$
$x^2-15x+225$
$\frac{16x^4-18x^2-20x-7}{2x-4}$
$\frac{n^3-1000}{n-10}$
$-2x^{3}+6x^{2}+2x-6$
$-\frac{4\pi}{7}+2\pi$
$f\:\left(x\right)\:=\:\frac{6}{3x^2}$
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