$9m^2+12m+4m$

$\left[-2+\left[-3\right]\right]-\left[5-\left[-4\right]\right]$

$\left(4x^3-9x+8\right)-\left(5x^3+3\right)$

$\int_{\frac{\pi}{4}}^{\frac{\pi}{3}}\left(\tanh^2\left(x\right)\mathrm{sech}^2\left(x\right)\right)dx$

$10x^2sen\left(3x+2\right)=7xsen\left(3x+2\right)$

$v^2+8v-9=0$

$f\left(x\right)=4x^{3}\text{find}f^{1\prime\prime}$