$7-\left(-4\right)+8$
$\frac{\left(\left(sinx+cosx\right)^2-1\right)}{cos^2x}=2tanx$
$\frac{1}{2\pi}\cdot\sqrt[2]{\frac{k}{m}}$
$2ab+5b-3abc$
$\lim_{x\to\pi}\left(\frac{\tan\left(x\right)}{\sec\left(x\right)}\right)$
$\left(11c\:-\:12\right)\left(11c\:+\:12\right)$
$\left(\sin\left(4b\right)+4\right)^2$
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