$\int\sqrt{1-4\cos\left(x\right)^2}\sin xdx$
$2\log\left(2n+2\right)-2\log\left(2n+1\right)$
$77\cdot73$
$\frac{cos^2x}{\left(1-sinx\right)^2}$
$y^2+2y-35$
$-55=\frac{w}{7}$
$\sqrt{x-3}=3$
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