$\frac{x}{22}+9=12$
$\:\:\left(8x^a\:y^7+5x^11\:y^b\:\right)\:\:entre\:x^3\:y^2\:\:\:\:$
$\left(a\:+\:7\right)\:-5\:\left(a\:+\:7\right)$
$\int\:t\:^2\:e^t\:dx$
$a^2-3a\:-\:70$
$\int\left(2x\sqrt{x^2-4}\right)dx$
$1-r^2cos\left(x\right)^2+r^2sin\left(x\right)^2$
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