$\left(x^2+2x-7\right)\left(2x^3-4\right)$

$6y^2-y-1=0$

$3tan^22x=1$

$\int\left(\tan\left(5u\right)\right)\sec\left(5u\right)du$

$25+\left(-15\right)+44\left(-17\right)$

$\frac{25n^2}{16y^2}-\frac{4a^2}{9x^2}$

$\frac{d}{dx}\left(\ln\left(\sin\left(x^2+3x\right)\right)-\frac{1}{2}\right)$