$25x^2+30x+36$
$\frac{\sin\left(2x\right)}{2\tan\left(x\right)}$
$3x-2\left(x+1\right)=2x-7$
$- 2 x ^ { 3 } \psi ^ { 3 } + x \varphi$
$\left(2x-2\right)-2\left(x^3+2x^2-3x+1\right)$
$\lim_{x\to3}x^2-x-3$
$\frac{dy}{dx}=\left(y^2+1\right)\left(x-2\right)$
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