$\frac{\left(9x^2\right)}{4}-25$

$8+x^2-4x^3+5x^2$

$\left(3\cdot4\cdot6\right)^5$

$\left(-9\right)\left(-1\right)\:x\:\left(-8\right)\:x\:\left(-3\right)\:x\:\left(4\right)$

$\left(13-7m\right)\left(13-7m\right)$

$\int\left(6x\cdot\cos\left(3x^2-1\right)\right)dx$

$-7-\left(-4+9-5\right)+\left(-3+6\right)$