$\frac{x-3}{3}<\frac{2x+9}{15}$
$\left(-12x^4y^3z^7\right)\left(-4x^2z^2\right)$
$\left(-2\right)^5-\left(-3^3\right)$
$\int\frac{2x+1}{x^2+36}dx$
$\left(x^{a+2}-y^{a+1}-5\right)^2$
$\frac{sen2x+cos2xsen2x}{sen2xsen2x}$
$2a^2-b^3-c^3-d^5;a=2;b=5;c=-3$
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