$11\cos\left(x\right)=2tan\left(x\right)$
$\left(-2\right)\:+\:5\:+\:\left(-3\right)\:+\:\left(-8\right)\:+\:10\:+\:\left(-1\right)=\:$
$-7c+2c$
$x^2-8x+11\le0$
$x^2-16h^2$
$\left(a+b\right)+c=a+\left(b+c\right)$
$14u-44$
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