$\sec\left(a\right)-\left(\sec\left(a\right)\right)\sin2\left(a\right)$
$\int\frac{6x}{\sqrt{x^2-49}}dx$
$tan\left(x+40\right)=0$
$-4-8x+-3+-9+-8$
$\left(5x+y\:^4\:\right)\:^2$
$x^2+4x-96=0$
$\int4xsin\left(2x+9\right)dx$
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