$1\:-3\:1\:3$
$1-\left(\sin\left(x\right)\right)^2=\frac{1-\cos\left(x\right)}{2}$
$25+40-\left(6-4\right)+\left|5-\left(8-9\right)\right|$
$\int-\frac{5sin\left(7x\right)}{cos^4\left(7x\right)}dx$
$1+\sqrt{121}$
$\int\left(5x\cdot e^{2x}\right)dx$
$-\left(3u-2x-1\right)$
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