$2x^2+6x+4\le0$
$3a-4-9a+5$
$-x^2-8x=-9$
$16y^7v^2w^824^2w^3$
$-32-32-56+12-4-8$
$57.4-6.8+8.23$
$\int63\csc\left(7x\right)\cot\left(7x\right)dx$
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