$\frac{sinx}{cosx+sinx}+\frac{sinx}{cosx-sinx}=tan2x$
$20 + 3 - 5 \times 5 + 3$
$\left(-1\right)\cdot\left(-1\right)\cdot\left(-1\right)\:\cdot\left(-1\right)\cdot\left(-1\right)\cdot\left(-1\right)\cdot\left(-1\right)\cdot\left(-1\right)$
$\left(11+3h\right)\left(11-3h\right)$
$\left(-12\right)\cdot m=48$
$e^y\cdot\cos\left(x\right)+\cos\left(x\right)+\left(e^y\cdot\sin\left(x\right)+e^y\right)\cdot\frac{dy}{dx}=0$
$64x^4-36y^8$
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