solve([2*x*(-5*10*x)=100],[x])

##</code><code>##

[x = - %I, x = %I]

##</code><code>##

integrate(sin(x)*exp(x^2),x);

##</code><code>##

solve([2*x^2+14*y+y^2=5,x*y+14*x+x^2=0],[x,y])