$x\:2\:-\:25x\:+\:100\:=\:$
$\csc\left(\frac{\pi}{2}-x\right)\cos\left(-x\right)$
$2\sin\left(x\right)=1-2\cos\left(x\right)$
$x\:+\:6\:=\:-7x\:-\:2$
$\left(2x^3-4yn\right)\left(2x^3+4yn\right)$
$\frac{2x^3+x^2-x}{x^2}$
$a^3+3a^2+3a+1$
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