$2x^2+5x-1<0$
$\left(2+3x+3x^2\right)-\left(2x+x^2-4\right)+\left(-5+x^2+x\right)$
$x^2+\sqrt{12x}+3$
$\int\frac{4x-5}{x^2+x-2}dx$
$\int_0^{\pi}\left(sen\left(x\left(1+p\right)\right)\right)dx$
$\left(3x^{a+1}\:+\:2y^a\right)^2$
$\left(-62.4\right)\:\left(-2.8\right)$
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