$7\left(3c+1\right)+c$
$x^2+12x+35=0$
$16.09+32.4+3.007$
$\frac{1-cos^2\left(x\right)}{cos^2\left(x\right)}$
$\left(4c^2+2d\right)\left(4c^2-2d\right)$
$6^2+x-2$
$\int45csc\left(9x\right)cot\left(9x\right)dx$
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