$x ^ { 2 } + 2 x + 3$
$-2\cdot\sin^2\left(x\right)+7\cdot\sin\left(x\right)-3=0$
$\int\left(e^{5u}\right)du$
$-35+-3+-38$
$-42-\left(-12\right)$
$6x^2-9x+15$
$tanx=\frac{2sinxcosx}{1+cos2x}$
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