$\int\left(3x+4\right)^{12}dx$
$2.0447^{2\cos\left(1.570\right)}$
$cos\left(2a\right)=0.8078$
$\cot^2x=\csc^2x-1$
$13-38+7x+2$
$\frac { n } { n }$
$\left(3x+2y+3z\right)+\left(3x-4y+5z\right)$
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