$x^2+23-140$
$7a-8c+4b+6c-4b+3a$
$5y^3-29y^2-6y=0$
$m^4-22m^2+40$
$\left(4xy^5-x^2\right)^2$
$tan\:\:a=1$
$2x+x^2-3+7+x^2+10$
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