$4x^2<1$
$3,625+8,125-10,75-2,25+1,2-17+31.1$
$-3+7-8+9-2+4$
$\sin\left(x\right)\left(\tan\left(x\right)+\cot\left(x\right)\right)=\sin\left(x\right)$
$\left(1-cos\right)\left(sec\right)\frac{1}{tan}$
$\frac{m^4-n^4}{m^2-n^2}$
$-6\left(4-r\right)=18$
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