$\left(+8\right)\cdot\left(+7\right)\cdot\left(-3\right)$

$\lim_{x\to0}\left(\frac{\left(b+x\right)^2-b^2}{x}\right)$

$-30+\left(-95\right)+\left(-95\right)+\left(-60\right)+\left(-30\right)$

$\int x\left(12-4x\right)dx$

$x^2-y^3^4$

$\int\frac{-4x^2}{\left(x^4-1\right)}dx$

$343a^3b^3-b^3$