$12a^2+4b\:a\:b\:+\:x^3\:y^2$
$b^4-2b^2+1$
$\frac{8x^2+24}{3x^4-7}$
$2+3x<12$
$8sin\left(2x\right)+10cos\left(x\right)=0$
$\frac{x^9+y^9}{x+y}$
$\int8sen\left(8x\right)dx$
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