$23,67\:x\:2,56$
$\tan\left(a\right)=\frac{1}{\sin\left(a\right)\cdot\cos\left(a\right)}-\frac{\cos\left(a\right)}{\sin\left(a\right)}$
$\frac{1}{\sec\left(x\right)}-\frac{1}{\cos\left(x\right)}=\cos\left(x\right)-\sec\left(x\right)$
$3x^4+5x^2+x$
$\frac{y^4}{y^2y^{-3}}$
$\:7^{-2}\cdot\:7^6$
$g\left(x\right)=\frac{1}{3}\sqrt{x}+\frac{2}{5}\sqrt[3]{x^2}-\frac{3}{\sqrt[5]{x^3}}$
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