$\left(-6-2\right)\left(3^2-4\right)$
$t^2\:u^2\:\:t^4\:$
$\sqrt{x^{\frac{3}{4}}}x^{\frac{1}{2}}$
$\frac{1-2\cos^2x}{\sin\left(x\right)\cos\left(x\right)}=\tan\left(x\right)\cot\left(x\right)$
$7-2,2-2,3$
$3cos\left(2x\right)=3cos^2\left(c\right)-1$
$22\:+\:30\:40\:+\:50\:+\:\left(-\:150\right)\:+\:\left(-\:80\right)\:$
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