$8^5$
$\int150\cdot sec^2x$
$\left(9x+20\right)^2$
$sen\left(\:a+b\right)cosa-cos\left(a+b\right)sena$
$5-\left(-4\right)+\left(-2\right)$
$-1+4-5-6+2$
$\int\frac{\left(2\right)}{\sqrt{x^2-4}}dx$
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