$2\cos\left(x\right)+2\sin\left(x\right)=\frac{1}{2\cos\left(x\right)-2\sin\left(x\right)}$
$81m^{16}-4n^{12}$
$3x^2+6x+4+x^2-2x-1$
$\frac{x^3y^2\:.\:4yx^4}{2yx}$
$m\left(4\right)=54^2$
$\int e^-x\cdot sin\left(w\left(t-x\right)\right)$
$30+0,75$
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