$-1.3\:.\:\left(-5.4\right)$
$\frac{7x+2x^2-6}{2x-3x^2}$
$-4\left(-1+-2\right)$
$\cot\left(2.4981\right)$
$\int_0^{\infty}\left(2e^{4x}\right)dx$
$\int\left(\frac{45x^9-2}{x}\right)dx$
$\left(3a+6b\right)^3$
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