$\frac{d}{dx}2^x+x^2$

$\lim_{x\to-\infty}\left(\frac{6x}{\sqrt{6x^2-1}}\right)$

$\frac{4x^3-3x^2+2}{3x^2+2}$

$\frac{7}{10}x^2+\frac{3}{10}x^2-\frac{6}{10}x^2$

$\left(\frac{b}{7}\right)^2$

$\left(-5\right)\cdot\left(-2\right)\cdot\left(-3\right)\cdot\left(2\right)$

$\left(1-\sin\left(12\right)\right)\left(1+\sin\left(13\right)\right)$