$2\sin30\cos60$
$35:-7$
$4\left(x\:-\:2\right)\:+\:2\:\left(x\:+\:1\right)$
$5\log x+6\log\left(x+8\right)$
$\left(3m+2x^3\right)^2$
$16x^2-32x+4$
$\lim_{x\to\frac{\pi}{4}}\left(\frac{sec^2\left(x\right)-2\tan\left(x\right)}{1+\cos\left(4x\right)}\right)$
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