$2x\le29$

$2\cos\left(2x\right)\left(1-\sin\left(2x\right)\right)$

$\left(a^2-5b^4\right)^2$

$3x^2-27x$

$40.375+26.5625+0.125+0.514285$

$\int\frac{9x+8}{\left(x+2\right)\left(x-4\right)}dx$

$t\cdot\frac{d\left(x\left(t\right)\right)}{dt}-\:2x\left(t\right)\:=\:2t^4$