$\left(17p\:+12\right).\left(17p\:-\:12\right)$
$-\frac{224}{-8}$
$\sin^2x-cos^2x=2\sin^2x-1$
$\int14dt$
$2\sin x\cos x+1=0$
$2sinx+cscx=0$
$100a^2+20ab+4ab$
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