$\left(x^2+7x+5\right)+3x^2+21x+17$
$2tan^{\left(2\right)}x+3secx=0$
$\int\:\frac{x+1}{\left(3x^2+6x-1\right)^{\frac{2}{7}}}dx$
$\int\frac{1}{u\sqrt{a^{2}-x^{2}}}dx$
$7+3.\left(\sqrt{9}.4-1\right)-18:3^2$
$x^2+18x-4$
$2\cdot3\left(5-4\right)-\left(4+3\cdot2-2\right)$
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