$\frac{9x^2-12x+4}{3x-2}$
$4x-6y-8y+3xy-9x-4y+3xy-2y+8xy-8x-5y+4x$
$4\cos\:2\theta+9=-14\cos\theta$
$\frac{2x^2-\left(x^2+1\right)\ln\left(x^2+1\right)}{x^2+1}$
$\frac{u^2-1}{u}dy=2ydu$
$\int y\sec\left(y\right)dx$
$11x-2y-2x+5+9y$
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