$\sqrt{2+2cosx}$
$1^{18}-9^2$
$\int ( 12 x ^ { 2 } + 4 ) ( 4 x ^ { 3 } + 4 x - 8 ) ^ { 3 } d x$
$300\sqrt{4}$
$a^2+2a-3$
$0x\cdot1x$
$\left(a^2-5\right)\left(a^2+12\right)$
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