1. Mika Rottenberg At Nicole Klagsbrun, 526 W. 26th St., nr. Tenth Ave.; 212-234-8645 A video installation, Dough, and related drawings—conflating bodily and industrial processes.2. Erika SomogyiAt Nicole Klagsbrun, 526 W. 26th St., nr. Tenth Ave.; 212-243-3335“Violet Dawn Love Song,” watercolors and a sculpture featuring romantic and hallucinogenic imagery (through February 11).3. Natalie FrankAt Briggs Robinson, 527 W. 29th St., nr. Tenth Ave.; 212-560-9075Large-scale, narrative paintings featuring female nudes, by an artist in her second year of the Columbia M.F.A. program.