$\int\left(\sec\left(3x+1\right)^2\right)dx$
$10x^2\:+\:10xy-\:30y^2$
$8x^2y^2-6x^27^2$
$9y+3-4x-2y-3x-5e$
$\int x\left(2x+5\right)^7dx$
$x^2=\sqrt{2}+\sqrt{3}$
$63.147\:+\:62\:+\:31\:+\:4$
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