$\left(1+tan^2w\right)cos^2w=1$
$\frac{180}{6}$
$4-8\sin^26x$
$\sqrt{9\left(3\right)}^2+4$
$\left(a+b+c\right)^2\left(a+b\right)^2-c^2$
$\frac{7x^3-14x^2}{7x^2}$
$\left(x+\frac{1}{4}\right)\left(x+2\right)$
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