$2^x=2$

$\left(4x^3+4x^2-5x-2\right)-\left(-2x^2-5x+6\right)$

$\int\left(4x+2\right)\ln\left(x+1\right)dx$

$\int_0^l\left(l-x\right)\left(qlx-\frac{q^2}{2}-\frac{ql^2}{2}\right)dx$

$4\cdot87^4$

$\frac{d}{dx}-4y^2-9=0$

$\sec^3\left(x\right)\cdot\tan\left(x\right)-\tan^3\left(x\right).\sec\left(x\right)=\sec\left(x\right).\tan\left(x\right)$