$b2-40b+1600$
$sin\left(2x-\frac{\pi}{2}\right)=-cos\left(2x\right)$
$\left(b+8c\right)\left(b-8c\right)$
$\left(\frac{x^2-9x+8}{x^3-3x-10}\right)\left(\frac{x^2-2x-15}{x^2-1}\right)^2$
$\left(9x-4\right)\left(9x+13\right)$
$\int_1^42tdt$
$x^2+2x-36$
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